Home

MPC OM-20000072 User's Manual

1. Figure 44 Website Login You will then be able to view the Home page as seen in Figure 43 on Page 49 and be able to click on the links that you have access to 6 1 1 Logging Logs and commands can be set up and logging statistics can be viewed from the Logging Control page Select one of above options by clicking on the appropriate button or return to the Home page by clicking on the Home button see Figure 45 Logging Control PAT TEST4 Select Option Figure 45 Logging Control 50 MPC User Manual Rev 0D Software Programs Chapter 6 6 1 1 1 Logging Setup You can set up logs for up to 5 channels on your MPC Select a channel and click on its button see Figure 46 Select Logging Channel to Set Up Chereeiz Charrada Logging Details for Channel 1 Char Vivere do send ihe dada Frzi kter cfle fl Hew chi 0 bo disable IB I Send Faase pursi corre F End support novate Saran EP Chasse When send the E Lagi dana Forever _ Seat Tine Pecan of baal Eis The carent UTC Hoar 20 Chace What data te ond rn ig
2. naga age do vase 44 Config Client Menus 1 45 Gonfig Eth rnet Menu hee eg eset hu leet Ebrei tubae 46 Config Modem Menus 2 2 4 1 47 Direct o ec it certa en ee itd eiie 48 Modulated Precision Clock Home Page 49 MPG Website er rt gi vue ten 50 MPC User Manual Rev 0D Logging eee ee 50 Set Up LOQGIAG 51 Command Response System Summary sss 53 LOGGING Statistics ed ede en een epp rettet i 55 Set Up Configuration nennen nens 56 General Receiver 56 Set Up E Mail Server nennen nennen nnne 57 Disk Maintenance ecco e dte ine tte Ec Ret t 58 Delete Files is Uem NEUE 58 Choose Files to Delete ere e eco m ep te Eb ees 59 Network Setup hri tete i te ee uic a uicti aint eias 59 Configure PPP POLt oii erede REP 60 Configure Modem 2 0 enne eene nnne nnn nnne nens 61 Gonfigur Ethernet Port e rr ette enl edet deua 62 Receiver Setup aasi ea 62 Current Receiver Configuration 2 64 Reload 65 Set Up Users ue ro tro tcd vat 65 Edit Sor cuiii RESCUE RE 66 Add New Ser om tb 66 Select Anal
3. 300 Modan 1200 bpr Hadiri Figure 8 Install New Modem In the Install New Modem dialog select a modem or direct connection from the list Insert your operating system install disk into your CD drive e g Windows NT and click on the Have Disk MPC User Manual Rev 0D 27 4 Using the button The modem installation will continue as seen in Figure 9 rau hane ekeni the folre reoderr Seri eb DFU de gau runi bo install B pert T Selected porte COM Figure 9 Modem Installation Continued Click in the Selected Ports field and select the PC port that your MPC will be connected to from the list Click on the Next button Tou modem hag been sel up M ges raged bo Heres double ckck Medea aca ini Control Panel thee modem and cick Popstar Figure 10 Modem Installation Finish Click on the Finish button see Figure 10 and you will be returned to the Modems Properties dialog see Figure 11 on Page 29 but you will now see the modem you installed 28 MPC User Manual Rev 0D Using the Chapter 4 todos Preece Figure 11 Installed Modem Properties Select your connection in the Modem column and click on the Properties button Its properties dialog will appear as seen in Figure 12 DISC EL am Figure 12 Connection Properties In
4. User Manual Rev 0D Table of Contents Proprietary Notice Software License Warranty Policy Customer Service Notices Foreword 1 Introduction Tel Models 1 2 Accessories and Options eene 2 Quick Start 3 MPC Setup Considerations 3 1 Choose the Right 3 2 Rear Panel Functionality ics ne tete rre tee nep CI the ER ERR ee 3 2 1 10 MHz In and 10 MHZ 9 214 iocis te vei vo acc add e Ped 3 2 5 RF Port amp 440000 3 3 Front Panel F nctionality rice tette ene telae 3 3 1 Connectors and Cables essen 4 Using the MPC AT Sel ToS 4 2 Configuring the 0 4 0 421 Ethernet Connect se sh nee tua rk naa no 4 2 2 Modem or Direct Connect PPP Client sees 4 3 COMMUNICATION 43 1 Eoggirig Data toman te radii Doe ete 43 2 Differential ite enean ene eee pn dne eX EA 43 9 roce 5 VFD Menus 5 T1 Ment ACCESS ee e eiie re p anes 5 14 Edit Digit Display 51 2 Edit Group DISplay tco m ee Ee n e YER n ER EPOR Ee n ea ores rame rin cose tuis evg
5. H handle 14 height 82 83 92 host 48 humidity 77 I I O 19 77 79 impedance 77 indicators 23 input 77 integration 12 13 internet connection 55 introduction 13 ionospheric 87 91 IP address 17 K keypad 14 23 40 41 kinematic positioning 85 93 L latency 86 latitude 81 92 L band frequency 82 LED 23 license 8 logging 38 50 52 55 longitude 81 92 loop back connector 20 loss of lock 93 low noise amplifier LNA 23 77 M Mark In 24 master control station 82 mean sea level 81 menu VFD 41 models 14 Modem 21 26 multipath 18 87 N Narrow Correlator tracking technology 87 99 Index navigation 81 NAVSTAR satellites 81 network configuration 25 38 I O 21 noise 87 93 notices 11 NovAtel Inc 2 8 10 97 see oscillators OEM4 Users Guide 97 offset 87 92 93 on off o switch 16 options 15 97 orbit period 81 oscillators 87 output 77 P parse responses 53 54 part numbers 97 performance 76 pin outs 79 plots 67 69 71 ports 19 77 communication 20 79 RF 23 position accuracy 76 modes of operation 14 static 03 post processed 14 power 77 cable 23 80 connector 22 interruptions 22 39 port 23 supply 22 PPP 21 26 precision 76 82 84 86 processing 82 83 85 program software 14 propagation 87 pseudorange 84 86 87 92 93 100 Q quick start 16 17
6. R radio frequency RF 18 23 reacquisition 76 real time 83 85 88 93 rear panel 19 receiver parameters 56 reference station 39 89 91 92 94 reload firmware 55 65 remote station 39 85 87 91 94 replacement parts 97 response summary 52 54 revision firmware 1 10 RF Loop Back 20 RF see radio frequency rover station 39 row cursor 40 RS232 20 79 RTCM 63 RTK 14 93 S SA see selective availability satellite 18 81 schedule 52 segment control 81 82 88 space 81 user 81 82 selective availability SA 84 88 self test 25 serial ports 21 setting up 16 21 38 single point 14 size 77 software upgrades and updates 75 space vehicle number SVN 82 specifications 77 78 speed 87 statistics 55 supply voltage 22 support 9 10 surveying 83 84 92 see space vehicle number MPC User Manual Rev 0D Index T TCXO see oscillators technical specifications 76 77 79 80 temperature 77 time to first fix TTFF 76 tracking loops 93 trigger event 24 tropospheric 87 91 U upgrades and updates 10 65 75 V velocity 81 82 VFD panel 25 40 configure 45 connect 44 direct 48 ethernet 46 logging 45 menu access 41 modem 47 power down 44 PPP 48 status 42 44 voltage 22 Volume 2 OEMA Users Guide 97 WAAS 95 warning 63 65 warnings 19 22 warranty 8 10 19 website 10 49 50 weight 77 MPC
7. III NORMAL WEAR AND TEAR IV DAMAGE CAUSED BY FORCE OF NATURE OR ACT OF ANY THIRD PERSON V SHIPPING DAMAGE OR VI SERVICE OR REPAIR OF PRODUCT BY THE DEALER WITHOUT PRIOR WRITTEN CONSENT FROM NOVATEL IN ADDITION THE FOREGOING WARRANTIES SHALL NOT APPLY TO PRODUCTS DESIGNATED BY NOVATEL AS BETA SITE TEST SAMPLES EXPERIMENTAL DEVELOPMENTAL PREPRODUCTION SAMPLE INCOMPLETE OR OUT OF SPECIFICATION PRODUCTS OR TO RETURNED PRODUCTS IF THE ORIGINAL IDENTIFICATION MARKS HAVE BEEN REMOVED OR ALTERED THE WARRANTIES AND REMEDIES ARE EXCLUSIVE AND ALL OTHER WARRANTIES EXPRESS OR IMPLIED WRITTEN OR ORAL INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE ARE EXCLUDED NOVATEL SHALL NOT BE LIABLE FOR ANY LOSS DAMAGE EXPENSE OR INJURY ARISING DIRECTLY OR INDIRECTLY OUT OF THE PURCHASE INSTALLATION OPERATION USE OR LICENSING OR PRODUCTS OR SERVICES IN NO EVENT SHALL NOVATEL BE LIABLE FOR SPECIAL INDIRECT INCIDENTAL OR CONSEQUENTIAL DAMAGES OF ANY KIND OR NATURE DUE TO ANY CAUSE There are no user serviceable parts in the GPS receiver and no maintenance is required When the status code indicates that a unit is faulty replace with another unit and return the faulty unit to NovAtel Inc Before shipping any material to NovAtel or Dealer please obtain a Return Material Authorization RMA number from the point of purchase Once you have obtained an RMA number
8. Illustration of GPSCard Height Measurements References 1 Topography 2 Geoid mean sea level 3 Spheroid ellipsoid GPSCard computed height above below geoid Geoidal Height undulation h GPS system computed height above the spheroid N h H From the above diagram and the formula h H N to convert heights between the ellipsoid and geoid we require the geoid ellipsoid separation value This value is not easy to determine A world wide model is generally used to provide these values NovAtel GPS receivers store this value internally This model can also be augmented with local height and gravity information A more precise geoid model is available from government survey agencies e g U S National Geodetic Survey http www ngs noaa gov or Geodetic Survey of Canada http www geod emr ca Why is this important for GPS users The above formula is critical for GPS users as they typically obtain ellipsoid heights and need to convert these into mean sea level heights Once this conversion is complete users can relate their GPS derived heights to more usable mean sea level heights B 3 GPS Positioning GPS positioning can be categorized as follows 1 single point or relative 2 static or kinematic 3 real time or post mission data processing A distinction should be made between accuracy and precision Accuracy refers to how close an estimate or measurement is to the true but unknown value precisi
9. window appears Figure 77 so that you can browse for a location for the file and save the file as a different filename if you choose Figure 77 Save As The Save As window is shown in Figure 77 Click on the Save button to save the file in your chosen location When you have finished selecting files from the Select File to Download window click on the OK button to return you to the Modulated Precision Clock home page 74 MPC User Manual Rev 0D Software Programs Chapter 6 62 Upgrades amp Updates The MPC includes two distinct processors in its enclosure e a GPS receiver Euro4 GPSCard e anembedded PC running embedded NT Both of these components has its own microprocessor and each microprocessor has its own firmware program software which is stored in non volatile memory What makes one MPC model different from another is software not hardware This unique feature means that upgrading the firmware is equivalent to getting an MPC with an entirely different set of features The following can be upgraded updated on the MPC e the PC software that controls the VFD display data storage communication web pages and more on your MPC OEMA firmware on the Euro4 GPSCard For upgrades updates to the Euro4 firmware and or PC software you will need to supply NovAtel Customer Service with the fixed IP address of your installed MPC so that we can program it remotely MPC User Manual Rev 0D 75 Appe
10. 0 LEAR ATKI LEAR ALIE d 1 DEKEN EHARLE WAASTETTHMOTE E TOGGLEFFS COMI TOMER 1 0r OLD COMI 7 t i status messages to COMI amp XXEWLEVELEB 3 06890 m COM1 They are used to COMI TE 10 6060 5 00000 E is update screens and plots COMI EZ LOCETTESRITARCIE 10 000000 WL do not adjust COMI COLTIME 3 COREE E Figure 60 Current Receiver Configuration 64 MPC User Manual Rev 0D Software Programs Chapter 6 6 1 2 6 Reload Firmware In the Setup Configuration dialog see Figure 49 on Page 56 click on the ReLoad Firmware button to bring you to the screen shown in Figure 61 Adus My Service Sop Up Load a File to the MEC D eiratan of E Fir te plost Ara Losi File Stat Up the CEMA Loader Control Sin Loader Figure 61 Reload Firmware WARNING The Reload Firmware page is intended for use by NovAtel Customer Service personnel only Incorrect commands on this page may result in the MPC being permanently disabled For more information on firmware or PC software upgrades updates please see Section 6 2 MPC Firmware Upgrades amp Updates on Page 75 6 1 2 7 Set Up Users Click on the Set Up Users button in the main Configuration Se
11. 000 000 000 000 CONNECT NO 000 000 000 000 CONNECT IYES 192 168 001 201 Figure 29 MPC Connect Menu MPC User Manual Rev 0D Using the Chapter 4 Change the DIRECT row status to CONNECT YES Once you have pressed the ENTER key the MPC will attempt to dial in to the host computer If successful the IP address will appear in the DSTATUS row if there are no errors and an error message will appear if there is an error Open your internet browser and type in the IP address shown in the DSTATUS row as the URL If successful you should see the loading screen as shown in Figure 30 Loading Figure 30 Loading Screen This is followed by the Log In dialog as shown in Figure 31 HEI 1 HAI 4 Real MPC prese 0002 Save thie parwan in o Figure 31 Website Password At this point you can use the preconfigured Administrator User Name and Password to log on to the Modulated Precision Clock website User Name Administrator Password Administrator If you are successfully logged on to the Modulated Precision Clock website you should see its home page see Figure 43 Modulated Precision Clock Home Page on Page 49 We recommend that you change the Administrator Password to protect your MPC from unwanted access If you forget your Administrator Password you can set up a new Client User Name and Password through the
12. Loop Back connector Therefore by default the 10 MHz Oven Controlled Crystal Oscillator OCXO in the MPC is looped back to the GPS receiver The GPSCard phase locks to the 5 or 10 MHz reference signal supplied to the rear panel 10 MHz port The RF Loop Back connector can be removed if you prefer to provide your own external oscillator through the 10 MHz In connector In this case the EXTERNALCLOCK command refer to Volume 2 of the OEM4 Users Guide and List Current Configuration on Page 63 allows you to set up an external oscillator and its frequencies Figure 4 shows how the clock card and Euro4 card work together using the loop connector or using a user supplied external clock bv GPS Antenna 1 Oscillator LED when blue indicates that the T internal OCXO is powered on lt lo Optional Mss GPSCard external 7 oscillator be used if loop imn back connector 19 is removed 15 hae 8 I iS Power 5 12 On Off 8 Ia lt Control lo S E E ig 5 iz 10 I 10 5 E 1O 10 MHz Oscillator 10 2 Clock Card Optional user supplied external 229 device may be 10 MHz Out nm synchronized with the MPC Amp g 4 Figure 4 10 MHz In Out Data Flow For further
13. PREQUEL YOTI XTTERFACEMCDE TOZAVI ETS CCMA RTE SCLIN ZTEEFVENTEIEE ETHAN SIATUGOOBHFE SIATUSCOBMPFKI SIAKTUSCOHPFKI ZSIATUSITOHIM SIATUSCOHFE STATUORCOHFKE STATOGCOREFE STATO OTE THHEEDATUM HEKIHTMODEL n A ASCOREECTIC H Software Programs from GPS DH 1 100604 EHKELE COMI SEXO H 3 1 OEF Used by MPC s internal Euro4 COMD MO 18 OFF x receiver do not adjust Coli n H3 15 OFF c 1 5 121 ANTO 1 AUTO AIF 1 CX OME 1 000900002 30 1 0000 27 Used by internal 10 ODE MHz OCXO do not adjust HVA TEL HOVATEL Obl CUM HOVATEL HOVATEL OH CONT HOVATEL HOVATEL DH SE WOVATEL HOVATEL OU OHHEW 0 AIO iQ HOLDS OON BEXSDATUSSVEHTA CHEE d DOE HOLD RXETATUESVEHTA 0 HOLD CORRECTION D 000000000 FT EOGIDOE TEE DEFAULTS AUTO THEE SH 0 ee Cr 1 AUTO OE la RC me ea STATUES AUXI AUXI SET STATUS 4 AIDC SET AITX3 CLEAR STATUS
14. Precision Clock FTP site records raw data in the form of logs which are written to the hard disk as configured in the Modulated Precision Clock website If you wanted to analyze the data in these logs yourself the details of the logs are documented in Volume 2 of the 4 Users Guide 43 2 Differential GPS 38 If you are using your MPC as a reference or remote station to receive and transmit differential corrections you will need to provide a data link between the reference station and rover s Generally MPC User Manual Rev 0D Using the Chapter 4 a data link capable of data throughput at a rate of 2400 bits per second or higher is sufficient for the examples shown below The external device is connected to the MPC s DGPS port with a user supplied RS232 cable Pre configure the MPC as a base station via the Modulated Precision Clock website see Set Up Base Station on Page 63 for details Pre configure a rover remote station for example a NovAtel ProPak or DL 4 receiver as follows interfacemode port rx type tx type For example RTCA interfacemode com3 rtca none RTCM interfacemode com3 none CMR interfacemode com3 cmr none The DGPS port on the back of the MPC is connected internally to COM3 of the Euro4 GPSCard MPC commands can be issued via the Modulated Precision Clock website see List Current Configuration on Page 63 for details 43 3 Errors In the case of a power interru
15. VFD CONFIG CLIENT menu see Section 5 2 3 Configure Client on Page 45 and Figure 32 on Page 38 and toggle the ADMIN row to YES MPC User Manual Rev 0D 37 4 Using the 4 3 CONFIG CLIENT ABCDEFG TUVWXYZ PRIV NO CONTROL NO ACCESS NO VIEW NO SUBMIT INFO NO Figure 32 CONFIG CLIENT Menu You can add edit users and their privileges by choosing Setup in the Modulated Precision Clock home page followed by the Set Up Users button See also Section 6 1 2 7 Set Up Users on Page 65 Details on the Modulated Precision Clock website login and features can be found in Section 6 1 starting on Page 49 You can also monitor your connection status in the VFD CONNECT menu described in Section 5 2 2 Connect on Page 44 Communication After a network connection has been established the Modulated Precision Clock website is used for all other aspects of the system such as configurations monitoring and data collection See Section 6 1 starting on Page 49 for details on the Modulated Precision Clock website Some examples of the types of information that can be monitored via the website are e Temperature e Number of satellites e Clock feedback e Receiver messages e Multipath e Signal strength e Sky coverage 4 3 1 Logging Data The most basic activity is logging raw data Each logging session one uninterrupted period of time is stored on the internal hard disk and may also be downloaded via the Modulated
16. ambiguities can be fixed However satellite tracking is much more difficult and loss of lock makes reliable ambiguity solutions difficult to maintain A carrier phase measurement is also referred to as an accumulated delta range ADR At the L1 frequency the wavelength is 19 cm at L2 it is 24 cm The instantaneous distance between a GPS satellite and a receiver can be thought of in terms of a number of wavelengths through which the signal has propagated In general this number has a fractional component and an integer component such as 124 567 967 330 cycles and can be viewed as a pseudorange measurement in cycles with an initially unknown constant integer offset Tracking loops can compute the fractional component and the change in the integer component with relative ease however the determination of the initial integer portion is less straight forward and in fact is termed the ambiguity In contrast to pseudorange algorithms where only corrections are broadcast by the reference station carrier phase algorithms typically double difference the actual observations of the reference and remote station receivers Double differenced observations are those formed by subtracting measurements between identical satellite pairs on two receivers ADRaouple difference ADR 5 ADR x A sat gt z ADR B sat i ADR x B sat j A sat i An ambiguity value is estimated for each double difference observation One satellite is common to
17. as to the performance or results you may obtain by using the software The entire risk as to the results and performance of the software is assumed by you 6 For software UPDATES and UPGRADES and regular customer support contact NovAtel GPS Hotline at 1 800 NOVATEL U S or Canada only or 403 295 4900 Fax 403 295 4901 e mail to support novatel ca website http www novatel com or write to NovAtel Inc Customer Service Dept 1120 68 Avenue NE Calgary Alberta Canada T2E 8S5 7 Disclaimer of Warranty and Limitation of Liability a THE WARRANTIES IN THIS AGREEMENT REPLACE ALL OTHER WARRANTIES EXPRESS OR IMPLIED INCLUDING ANY WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE NovAtel DISCLAIMS AND EXCLUDES ALL OTHER WARRANTIES IN NO EVENT WILL NovAtel s LIABILITY OF ANY KIND INCLUDE ANY SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES INCLUDING LOST PROFITS EVEN IF NovAtel HAS KNOWLEDGE OF THE POTENTIAL LOSS OR DAMAGE b NovAtel will not be liable for any loss or damage caused by delay in furnishing the software or any other performance under this Agreement c NovAtel s entire liability and your exclusive remedies for our liability of any kind including liability for negligence for the software covered by this Agreement and all other performance or non performance by NovAtel under or related to this Agreement are to the remedies specified by this Agreement This Agreement is governed by the laws of th
18. correct narrow lane Thus the MPC User Manual Rev 0D 93 Appendix GPS Overview 94 searching process can more rapidly and accurately home in on the correct lane when dual frequency measurements are available Changes in the geometry of the satellites aids in ambiguity resolution this is especially noticeable in L1 only solutions In summary NovAtel s RTK system permits L1 L2 receivers to choose integer lanes while forcing L1 only receivers to rely exclusively on the floating ambiguity solution Once the ambiguities are known it is possible to solve for the vector from the reference station to the remote station This baseline vector when added to the position of the reference station yields the position of the remote station In the NovAtel RTK system the floating ambiguity and the integer position solutions when both are available are continuously compared for integrity purposes The better one is chosen and output in the receiver s matched position logs The best ambiguities determined are used with the remote station s local observations and a reference station observation model to generate the remote station s low latency observations MPC User Manual Rev 0D Appendix WAAS Overview The Wide Area Augmentation System WAAS is a safety critical system that provides a quality of positioning information previously unavailable The WAAS improves the accuracy integrity and availability of the basic GPS signals In
19. corrected pseudoranges are then processed in a least squares algorithm to obtain a position solution The wide correlator receiver design that predominates in the GPS industry yields accuracies of 3 5 m SEP NovAtel s patented Narrow Correlator tracking technology reduces noise and multipath interference errors yielding accuracies of 1 m SEP B 5 1 Pseudorange Differential Positioning B 5 1 1 GPS System Errors In general GPS SPS C A code single point pseudorange positioning systems are capable of absolute position accuracies of about 40 meters or less This level of accuracy is really only an estimation and may vary widely depending on numerous GPS system biases environmental conditions as well as the GPS receiver design and engineering quality There are numerous factors which influence the single point position accuracies of any GPS C A code receiving system As the following list will show a receiver s performance can vary widely when under the influences of these combined system and environmental biases e Jonospheric Group Delays The earth s ionospheric layers cause varying degrees of GPS signal propagation delay Ionization levels tend to be highest during daylight hours causing propagation delay errors of up to 30 meters whereas night time levels are much lower and may be as low as 6 meters e Tropospheric Refraction Delays The earth s tropospheric layer causes GPS signal propagation delays The amount of del
20. degradation will occur and the GPSCard may not be able to meet its performance specifications NovAtel offers a variety of single and dual frequency GPSAntenna models include band pass filtering and an LNA The GPSAntenna you choose models 501 511 521 and 531 are L1 only models 600 502 503 and 512 are dual frequency GPS Antennas will depend on your particular application Each of these models offer exceptional phase center stability as well as a significant measure of immunity against multipath interference Each one has an environmentally sealed radome NovAtel also offers high quality coaxial cable in standard 5 Model C005 15 Model C015 and 30 m Model C030 lengths These come with a TNC male connector at each end Should your application require the use of cable longer than 30 m you will find the application note Extended Length Antenna Cable Runs at our website http www novatel com or you may obtain it from NovAtel Customer Service directly see the Customer Service Section at the beginning of this manual High quality coaxial cables should be used because a mismatch in impedance possible with lower quality cable produces reflections in the cable that increase signal loss While there may be other coaxial cables and antennas on the market which may also serve the purpose please note that the performance specifications of the MPC are warranted only when it is used with NovAtel supplied accessories The Euro4 GPSCard i
21. maintain the 1PPS signal within 10 ns of GPS time The bandwidth of the OCXO clock steering loop is adjustable with a default value of 1 100 Hz or approximately a 15 minute time constant The CLOCKADJUST command is used to enable or disable the clock steering The CLOCKCALIBRATE command is used to set the parameters of the clock steering loop It also provides an auto calibration procedure to find or reset the centre point and gain of the control loop Please refer to Volume 2 of the OEM4 Users Guide for details on these commands Immediately on start up of the receiver the is active at 1Hz but it is not aligned to the GPS epoch The timing of the IPPS will be adjusted when position time is known 1 Hz GPS measurements are taken on the IPPS These measurements include pseudorange carrier phase and Doppler 3 3 1 3 Mark Input The Mark In connector provides a connection for an input mark with an input pulse greater than 55 ns Time tags output log data to the time of the falling edge of the mark input pulse Logs with the ONMARK trigger will output when a trigger event passes the Mark In connector If you supply the reference frequency and 1PPS signal your signal will be connected to the Mark In connector The receiver can be configured to adjust its internal 1PPS to match your 1PPS to within 50 ns Refer to the ADJUSTIPPS command in Volume 2 of the OEM4 Users Guide MPC User Manual Rev 0D Chapter 4 Using the MPC
22. may physically damage the unit voiding the warranty The power cable will automatically adapt its input power to the national power source in the country of use as long as it is within the above range and you have an adapter for your local power receptacle Figure 78 Power Cable 80 MPC User Manual Rev 0D GPS Overview The Global Positioning System GPS is a satellite navigation system capable of providing a highly accurate continuous global navigation service independent of other positioning aids GPS provides 24 hour all weather worldwide coverage with position velocity and timing information The system uses the NAVSTAR NAVigation Satellite Timing And Ranging satellites which consists of 24 operational satellites to provide a GPS receiver with at least six satellites in view at all times A minimum of four satellites in view are needed to allow the GPSCard to compute its current latitude longitude altitude with reference to mean sea level and the GPS system time Figure 79 NAVSTAR Satellite Orbit Arrangement B 1 GPS System Design The GPS system design consists of three parts e Space segment e Control segment e The User segment these parts operate together to provide accurate three dimensional positioning timing and velocity data to users worldwide B 1 1 The Space Segment The space segment is composed of the NAVSTAR GPS satellites The constellation of the system
23. of the errors introduced by the above types of system biases Pseudorange differential positioning is quite effective in removing most of the biases caused by satellite clock error ionospheric and tropospheric delays for baselines less than 50 km ephemeris prediction errors and SA However the biases caused by multipath reception and receiver clock offset are uncorrelated between receivers and thus cannot be cancelled by between receiver single differencing operation Differential operation requires that stations operate in pairs Each pair consists of a reference station and a remote station A differential network could also be established when there is more than one remote station linked to a single reference station In order for the differential pair to be effective differential positioning requires that both reference and remote station receivers track and collect satellite data simultaneously from common satellites When the two stations are in relatively close proximity 50 km the pseudorange bias errors are considered to be nearly the same and can be effectively cancelled by the differential corrections However if the baseline becomes excessively long the bias errors begin to decorrelate thus reducing the accuracy or effectiveness of the differential corrections Figure 84 Typical Differential Configuration Y Radio Data Link A 99 Yo GPSAntenna With Chokering Differen
24. received and processed by OEMA family GPS receivers with appropriate firmware GPS user receivers are thus able to receive WAAS data in band and use not only differential corrections but also integrity residual errors and ionospheric information for each monitored satellite The signal broadcast via the WAAS to the WAAS users is designed to minimize modifications to standard GPS receivers As such the GPS L1 frequency 1575 42 MHZ is used together with GPS type modulation e g a Coarse Acquisition C A pseudorandom PRN code In addition the code phase timing is maintained close to GPS time to provide a ranging capability MPC User Manual Rev 0D 95 Appendix WAAS Overview C 1 Geostationary i Satelite GEO Constellation 1 amp C band Se SC x Integrity data st differential corrections W and ranging control ve Wide area Reference Station WRS Wide area Reference Station WRS Wide area Reference Station WRS 1 T d Ground Uplink uM gt Station GUS aster Station lt Integrity data WMS h differential corrections time control and status Figure 85 The WAAS Concept MPC with the WAAS Option LIL2W model of the MPC is equipped with the WAAS EGNOS option The ability to simultaneously track two WAAS satellites and incorporate the WAAS EGNOS corrections into the posit
25. the General tab ensure that the Maximum Speed is set to 115200 to match the MPC Click on the MPC User Manual Rev 0D 29 4 Using the OK button Return to the Control Panel and select the Network icon as seen in Figure 13 5 Network Figure 13 Network Icon The Network dialog appears as seen in Figure 14 Figure 14 Network Services Select the Services tab in the Network dialog Click on the Add button to add a Remote Access Service RAS and the Select Network Service dialog will appear as seen in Figure 15 on Page 31 30 MPC User Manual Rev 0D Using the Chapter 4 Figure 15 Select Network Service Select Remote Access Service and ensure your operating system install disk is in the PC disk drive Click on the Have Disk button and the Add RAS Device dialog will appear as seen in Figure 16 RAS Derice Figure 16 Add RAS Device Select your connection in the RAS Capable devices field and click on the OK button The Configure Port Usage dialog will appear as seen in Figure 17 Conliguie Fol Usage Figure 17 Configure Port Usage Click in the Receive Calls Only field and then click on the OK button The Network Configuration dialog will appear as seen in Figure 18 on Page 32 MPC User Manual Rev 0D 31 4 Using the Figure 18 Network Configuration Check the TCP IP check box and click in the Allow Any Authentication Including Clear Text fiel
26. the future the wide area of coverage for this system will include the entire United States and some outlying areas At the time of publication there are two WAAS satellites over the western Atlantic Ocean and the Pacific PRN 122 and PRN 134 respectively and one EGNOS satellite over the eastern Atlantic Ocean PRN 120 WAAS data is available from any of these satellites and more satellites will be available in the future The primary functions of WAAS include edata collection determining ionospheric corrections determining satellite orbits edetermining satellite clock corrections determining satellite integrity independent data verification WAAS message broadcast and ranging system operations amp maintenance As shown in Figure on Page 96 the WAAS is made up of a series of Wide Area Reference Stations Wide Area Master Stations Ground Uplink Stations and Geostationary Satellites GEOs The Wide Area Reference Stations which are geographically distributed pick up GPS satellite data and route it to the Wide Area Master Stations where wide area corrections are generated These corrections are sent to the Ground Uplink Stations which up link them to the GEOs for re transmission on the GPS L1 frequency These GEOs transmit signals which carry accuracy and integrity messages and which also provide additional ranging signals for added availability continuity and accuracy These GEO signals are available over a wide area and can be
27. you to type in your e mail server user identification Click on the Go button to save your changes or on Cancel to disregard your changes and return you to the main Setup Configuration page 6 1 2 3 Disk Maintenance In the Setup Auto Disk Cleanup section of the Disk Maintenance window see Figure 52 on Page 58 select the type of cleanup to allow The choices are Disable auto disk cleanup Data logging will stop when the disk space reaches the minimum set in the Minimum Free Disk Space Full Level MB edit field Delete Old Files Enter the maximum age of files to keep in days Files older than this will be deleted Delete the Oldest Files when Full Enter the minimum disk space to be left This is done by replacing old files with new files that go over the minimum MPC User Manual Rev 0D 57 6 Software Programs Setup Auto Disk Cleanup C Disable auto disk cleanup Daia logging will step when disk is Gall C Delete Old Files a0 Age te keep files days E Delate the Files whan Ful Minimum fee disk space Ful level mE Auto Cleanup values Cleanup Now Delete Files Figure 52 Disk Maintenance Click on the Set Auto Cleanup Values button to save your selection or click on the Cancel button to disregard your changes and return you to the main Configuration Setup window Click on the Delete Files button and the Delete Files window will appear as seen in F
28. 002 00 08 131540 44 2 Cm by Channel Zj2LCOX3 THEZPORT 2 carr z002 03 08 155540 45 bar Log Chanel d 2 2 Ls THLPORT 2 opchangsd 2002 08 08 1555440 45 gt bp LegChazzall LOI 2 rangeempb 15 2 03 00 15 55 40 45 Cad by LegChaenel Les THESPORT_2 waze Misspelling 21 09 08 13352440 53 Bee OE MEL 2002 03 08 13354043 Be 0E 7 2003 03 08 155540 78 gt lt gt 2002 09 08 15554154 2BRe 2E ORL zug 03 08 155541 6 EREOX moid Feld RZHWILEVELSB CCM1 4 Error Message 202 03 06 155824 37 SSATP Thread 3 Event 2002 03 08 155624 97 SMTP Thread 3 SMTP Coazection Faded Connecion Figure 47 Command Response System Summary MPC User Manual Rev 0D 53 6 Software Programs There are three types of output in the summary Cmd Prs A log summary in the form YYYY MM DD hh mm ss ss gt LOG THISPORT log where YYYY is the calendar year e g 2002 MM is the calendar month 01 12 DD is the calendar date 01 31 hh mm ss ss 18 the time in hours 00 23 minutes 00 59 and decimal seconds 00 00 59 99 in GMT LOG or UNLOG c is the channel number log is the LOG command if applicable Please refer to Volume 2 of OEM4 Users Guide for possible formats of the LOG command and for a listing of the available log
29. 1993 Guideline for the Application of GPS Positioning p 22 O Minister of Supply and Services Canada 84 MPC User Manual Rev 0D GPS Overview Appendix B positioning requires either a data link between the two stations if the positioning is to be achieved in real time or else post processing of the data collected by the remote station At least four GPS satellites in view are still required The absolute accuracy of the remote station s computed position will depend on the accuracy of the reference station s position Figure 82 Example of Differential Positioning GPS satellites gom GPS antenna lt 22 ow Differential GPS antenna data shown with choke ring ground plane User with hand held computer Remote station Reference station B 3 2 Static vs Kinematic Positioning Static and kinematic positioning refer to whether a GPS receiver is stationary or in motion while collecting GPS data B 3 3 Real time vs Post mission Data Processing Real time or post mission data processing refer to whether the GPS data collected by the receiver is processed as it is received or after the entire data collection session is complete MPC User Manual Rev 0D 85 Appendix GPS Overview B 4 Differential Positioning 86 There are two types of differential positioning algorithms pseudorange and carrier phase In both of these approaches the quality of the position
30. 2 Suig 24132 1 156p cdzrac2 030800 ban Z 2002 01 09 155539 ad ber Lehane 2 WHLCOCALT THIERORT 2 Pre 2002 03 08 15 55 30 SMTP Thread 2 betaing Puch elereent 3 Prac 2002 03 08 05 55239 5 SMTP Thread 2 Push to Pre 2002 03 08 15 55 39 95 EMT Thread mtanga Puch Body Esrorded Data Fig Hane np ote DG 2 Start Time 2002 05 08 OO O00 Sieg 2002 03 09 00 00100 000 log 15 lag Exi WLEVELSE 60 Log5und 1 LogtomP mpr mid 20308100 ban 2 22 Log2w 55 EXCUHEIO Eecerrer Con amp guraacn Stan Lag5umI 28 EX WEPHEM Rew Epheraeris narration Logani 1 VERSION Dupes vernon information 66 PING Connsrken Client Chater LogSun 5 ACE GEMM Card category Logier Tatal Bizary Loge 50 Logs un ASC Lop 56 Tatal 71 Logie Total Logs Pre 2008 03 08 155539 05 SM TP Thread 32 Intang Push af File 1 5 mpc rni bin Z 2002 03 08 1555 39 96 24S M IFTIIeead 2 15 Cormier te Mal Serves shasenid ca ihirecable ort User Fra 2002 03 08 125339 37 JSMF Thad 3 HzstEeiake3 Event zu 03 08 13554001 xRescoronE POM 2002 03 08 15 55 40 43 Leg Ceca erg ben 2 202 03 08 1535540 44 end by Loge 2 vera once 2
31. 229 orcad rangecmphb zncime 13 Figure 46 Set Up Logging First choose where to send your data If you select Log to File give your schedule for that channel a name in the First Characters of File Name field If this field is left blank the schedule for that channel will be ignored The name you give this schedule will form part of the filename written to the hard disk in the MPC The file name will take the form FIRSTCHARSyymmddhh where FIRSTCHARS is the name you gave to the schedule in the First Characters field yy mm and dd are the year month and date respectively and are generated from the MPC s internal Time at the nearest hour hh on a 24 hour clock on every hour that is divisible by the Rollover amount Click in the Compressed check box if you wish your file to be compressed Enter the amount of rollover time in hours in the Rollover field If you enter 0 roll over is disabled You may also send your data to a Remote FTP site as an e mail file attachment and a Stream User Datagram Protocol UDP by clicking in their respective check boxes and entering appropriate information in their required fields The UDP message format is shown in Table 2 on Page 52 MPC User Manual Rev 0D 51 6 Software Programs 52 Table 2 UDP Message Format Description Offset Size Type Value Syncl 0 1 uchar OxAA Sync2 1 1 uchar 0x44 Sync3 2 1 uchar 0x16 MPCID 3 4 ulong 0 MAX_ULON
32. 5 The information in this column is refreshed every second unless another column in the menus is being edited The 1 second refresh will continue once the editing has stopped As seen from Figure 37 on Page 42 there are several STATUS functionality categories MPC SYSTEM STATUS TIME The current GMT time in hours minutes and seconds The time is the PC time which is steered by GPS DATE The current GPS week and seconds into the week once the GPS Card has a valid solution and is connected GPS On start up CONNECTED will be displayed until the GPS Card is connected Then information on any GPS receiver system errors detected are displayed When there are no errors there is a GPS SYSTEM OK message e EXT OSC Displays either LOCKED or NOT LOCKED depending on if the oscillator in use has achieved lock or not respectively e LOGGING Shows if the logging of GPS data is currently ACTIVE or NOT ACTIVE SPACE Provides the available recording space left on the MPC hard drive in megabytes mB COMPUTER Shows the name given to the MPC See Configure Ethernet on Page 46 where the computer name can be edited MPC POSITION INFO POS TYPE Current position mode NO POSITION There is no current position mode FIXED POSITION The position has been fixed SINGLE POINT The position is from single point averaging PSR DIFF POS The position measurement is from pseudorandom code o
33. 6 5 MP C Powet Cable eo ee a 97 6 Accessories and 22222404 00000000 eene 97 MPC User Manual Rev 0D Software License BY OPENING THE SEALED DISK PACKAGE ENVELOPE YOU ARE AGREEING TO BE BOUND BY THE TERMS OF THIS AGREEMENT IF YOU DO NOT AGREE TO THE TERMS OF THIS AGREEMENT PROMPTLY RETURN THE UNOPENED DISK PACKAGE AND THE ACCOMPANYING ITEMS TO NovAtel Inc 1 License NovAtel Inc NovAtel grants you a non exclusive license not a sale to use one copy of the enclosed NovAtel software on a single computer and only with the product whose model number and serial number appear the envelope 2 Copyright NovAtel owns or has the right to sublicense all copyright trade secret patent and other proprietary rights in the software and the software is protected by national copyright laws international treaty provisions and all other applicable national laws You must treat the software like any other copyrighted material except that you may either a make one copy of the software solely for backup or archival purposes or b transfer the software to a single hard disk provided you keep the original solely for backup or archival purposes You may not copy the product manual or written materials accompanying the software 3 Restrictions You may not 1 copy other than as provided for in paragraph 2 distribute rent lease or sublicense all or any portion of the software 2 modify or prepare d
34. Before using MPC for the first time ensure that you have followed the installation instructions of Chapter 2 Quick Start and Chapter 3 MPC Setup Considerations starting on Page 16 A CAUTION See the cautions on Page 11 of the Notice for a list of items you should be aware of as you set up and use the MPC 4 1 Self Test When power is applied it takes several minutes for the computer within the MPC to boot up It takes up to 15 minutes for the internal OCXO to warm up to a point where the frequency is stable enough to track satellites Once powered and stable the MPC performs the first phase of self test functions If no problems are detected the STATUS LED on the front of the MPC will glow green You can monitor the MPC using the VFD panel Status menu and or RXSTATUS log Self test status of the internal GPSCard can be examined via the self status word in the RANGE and RXSTATUS data logs refer to Volume 2 of the OEM4 Users Guide System and logging status reports may also be seen via the internet on the Modulated Precision Clock website see Section 6 2 MPC Firmware Upgrades amp Updates starting on Page 75 If the MPC fails its self test please refer the problem to your dealer or NovAtel Customer Service 4 2 Configuring the Network There are three connectors on the back panel of the MPC that allow connectivity to the internet Ethernet Modem Direct PPP These MPC internet ports user security and internet method
35. Cable Part Description NovAtel Part MPC power cable assembly 01017085 Table 6 Accessories and Options Part Description NovAtel Part Modulated Precision Clock MPC MPC Euro4 GPSCard Euro4 PC Software CD 01016826 Optional OEM4 GPSCard Command Description Manual Volume 1 Installation OM 20000046 and Operation OEM4 GPSCard Command Description Manual Volume 2 Commands and Logs OM 20000047 Optional NovAtel GPSAntennas Model 600 11 12 GPS 600 Model 501 L1 only GPS 501 Model 511 L1 only GPS 511 Model 521 L1 only GPS 521 Model 502 L1 L2 GPS 502 Model 503 L1 L2 GPS 503 Model 512 L1 L2 GPS 512 Optional RF Antenna Cable 5 meters 16 4 005 15 meters 49 2 C015 30 meters 98 4 C030 22 cm 8 66 interconnect adapter cable GPS C002 MPC User Manual Rev 0D 97 10 MHz in out 20 24 5 24 accessories 15 97 accuracy 76 horizontal 84 positioning 87 93 reference station 92 aerial photograph 93 almanac data 82 ambiguity fixed 93 analysis plots 67 69 71 antenna active 18 23 cables 18 23 97 dual frequency 18 input 77 models 18 97 power 18 single frequency 18 site 88 atmosphere 84 02 authorization code 14 B base configuration 55 63 base station 39 BNC connector 20 24 broadcast corrections 87 03 ephemeris 87 overview 82 C A code 82 cables 16 19 23 97 antenna 18 coaxial 18 23 extended cable lengths 18 pa
36. Clock USER MANUAL Modulated Precision MPC OM 20000072 Rev 0D Proprietary Notice Modulated Precision Clock MPC User Manual Publication Number OM 20000072 Revision Level 0 Revision Date 2002 03 27 Proprietary Notice Information in this document is subject to change without notice and does not represent a commitment on the part of NovAtel Inc The software described in this document is furnished under a licence agreement or non disclosure agreement The software may be used or copied only in accordance with the terms of the agreement It is against the law to copy the software on any medium except as specifically allowed in the license or non disclosure agreement No part of this manual may be reproduced or transmitted in any form or by any means electronic or mechanical including photocopying and recording for any purpose without the express written permission of a duly authorized representative of NovAtel Inc The information contained within this manual is believed to be true and correct at the time of publication NovAtel MiLLennium RT 20 and RT 2 are registered trademarks of NovAtel Inc MPC GPSCard and GPS Antenna are trademarks of NovAtel Inc All other brand names are trademarks of their respective holders Copyright 2002 Novatel Inc All rights reserved Unpublished rights reserved under International copyright laws Printed in Canada on recycled paper Recyclable 29 69 2
37. DDR row will be deleted ADDR The internet protocol IP address MPC User Manual Rev 0D 47 Chapter 5 VFD Menus CFG MODEM HOST The MPC modem is preconfigured for auto answering as a host It will issue an IP address in the range 192 160 200 to 192 160 215 and establish a PPP connection to the client The client must use an Administrator username and password or set up a user see also Section 5 2 3 Configure Client on Page 45 e ASSIGN YES or NO depending on whether or not respectively the IP start and stop addresses are assigned automatically If ASSIGN is changed to YES then the IP START and IP STOP rows will not be editable P START Start of address space that the MPC will use to issue addresses P STOP End of address space 5 26 Configure Direct PPP The CONFIG DIRECT menu allows you to configure the connection with a host computer that is connected directly to the MPC via an RS232 cable Figure 42 shows the CONFIG DIRECT menu CONFIG DIRECT CLIENT 4 115200 8NONE1 5 PASSWORD5 AUTO IP NO 000 000 000 000 Figure 42 Config Direct CONFIG DIRECT MPC Shows if the MPC is functioning as a client PC COM The communication parameters for the PPP port PROTO The network protocol The two choices are Point to Point PPP or Serial Line Internet SLIP Protocol USRNAME The user name that the MPC will use to sig
38. Domain Name Server DNS In this case you would access your web page via the URL http mpcl See also the Connect and Config menu sections of Chapter 5 VFD Menus starting on Page 44 and Section 4 2 Configuring the Network on Page 25 for information on configuring your MPC and connecting to the internet using the VFD menus xi Modulated Precision Clock PAT TEST4 Select Option Analysis Plots mE Total dark gm za Hr ler 1 30 ath Av HE Cal gary T IR E51 Figure 43 Modulated Precision Clock Home Page MPC User Manual Rev 0D 49 Chapter 6 Software Programs As seen from Figure 43 on Page 49 there are four options in the Modulated Precision Clock home page Logging see Section 6 1 1 Logging below Setup see Section 6 1 2 Setup Configuration on Page 55 Analysis Plots see Section 6 1 3 Analysis Plots on Page 67 Download Data see Section 6 1 4 Download Data on Page 72 Once you are on the Modulated Precision Clock web page you can type in your user ID and password and click on the OK button to log in Your MPC administrator is responsible for updating users and passwords please see Section 5 2 3 Configure Client on Page 45 An example of the Modulated Precision Clock website login is shown in Figure 44 below Fs Hetero Please pond beim i
39. ENNAPOWER command refer to Volume 2 of the OEM4 Users Guide The receiver obtains a partially filtered and amplified GPS signal from the antenna via the coaxial cable The RF section performs the translation from the incoming RF signal to an IF signal usable by the Euro4 s digital section It also supplies power to the active antenna s LNA through the coaxial cable while maintaining isolation between the DC and RF paths The RF section can reject a high level of potential interference e g MSAT Inmarsat cellular phone and TV sub harmonic signals For further information on the signals or connector type for the GPS Antenna In connector please see Appendix A Input Output Connectors on Page 77 While there may be other coaxial cables on the market that might also serve the purpose please note that the performance specifications of the MPC are guaranteed only when it is used with NovAtel supplied RF cables 3 3 Front Panel Functionality As shown in Figure 5 the MPC s front panel has a VFD display with a keypad including an ENTER and ESC button see Chapter 5 Menus on Page 40 and a power PWR button see Section 3 2 4 Power on Page 22 Figure 5 MPC Front Panel There are three color indicators above the VFD screen Power This LED glows red while power is applied Status This diagnostic LED glows green to indicate satellite tracking and computed solution If the indicator is not illuminated the receiver is not track
40. G unique MPC station ID see Section 6 1 2 1 Set MPC Name on Page 56 Hop Count 7 1 uchar 0 255 the number of times the UDP was forwarded between NovAtel relay stations Message Length 8 2 ushort 0 65535 size of the imbedded message but not including the header Message 10 lt 65535 binary NovAtel OEM4 ASCII or binary message Next choose when to send the data or set up a schedule Choosing CONTINUOUS logs your data continuously It will start a new file every hour that is divisible by the Rollover amount in the Choose Where section The other choices are Everyday Weekdays Weekends and Only Today If you select any of these choices you can then enter a UTC start time in hours in the Start Time field and the amount of hours to continue logging in the Duration field The start time refers to the start of the day Finally type in the logs you want in this schedule in the Choose What section s edit box Ensure each log request is on a new line For more information on the available logs for the OEM4 family of receivers please refer to Volume 2 of the OEM4 Users Guide Click on the Submit button when you have completed your schedule list The Command Response Summary for your schedule will appear An example is shown in Figure 47 on Page 53 If you misspell any of the logs the Command Response window will contain syntax errors for you to check Click on the Cancel button to return you to the main L
41. However in pseudorange differential operation between receiver clock offset is a source of uncorrelated bias Selective Availability SA Selective availability is when the GPS Control Segment intentionally corrupts satellite clock timing and broadcast orbit data to cause reduced positioning accuracy for general purpose GPS SPS users non military When SA is active range measurements may be biased by as much as 30 metres NovAtel s OEM4 GPSCard is a civilian dual frequency GPS receiver that normally tracks e C A Code e LI Carrier Phase e 2P or Y Code e 2 Codeless Carrier Phase P Code is never tracked on L1 even if AS is disabled Multipath Signal Reception Multipath signal reception can potentially cause large pseudorange and carrier phase measurement biases Multipath conditions are very much a function of specific antenna site location versus local geography and man made structural influences Severe multipath conditions could skew range measurements by as much as 100 meters or more The NovAtel GPS Card receivers are capable of absolute single point positioning accuracies of 15 meters CEP GDOP 2 no multipath when SA is off and 40 meters CEP while SA is on As the status of selective availability is generally unknown by the real time GPS user the positioning accuracy should be considered to be that of when SA is on The general level of accuracy available from single point operation may be suitable for man
42. L2 P Code or encrypted Y Code of up to 12 satellites Patented Pulsed Aperture Correlator PAC technology combined with a powerful microprocessor make possible multipath resistant processing and excellent acquisition and re acquisition times Once you connect the MPC to an antenna and power source it begins operating as a fully functional GPS system see Chapter 2 Quick Start on Page 16 and Chapter 3 MPC Setup Considerations on Page 18 for more information on this topic Figure 1 shows the without an antenna or connecting cables Figure 1 MPC MPC User Manual Rev 0D 13 1 Introduction 1 1 Models and Features 14 The MPC is available in several different firmware models whose configurations may include other additional features Some possible configurations can be seen in Table 1 Table 1 MPC Controller Models Model Firmware Feature MPC LI L1 only MPC LIL2 LI L2 MPC LIL2W L1 L2 with WAAS a Please see Appendix C WAAS Overview on Page 95 the above models are capable of multiple positioning modes of operation Single point Pseudorange differential corrections Post processed RTK type accuracy The MPC has a carrying handle that can be adjusted through 360 degrees To move the handles press in the buttons and turn in the direction you want the handles to go Let go of the buttons and move the handle slightly so as to lock it in place Each model
43. Modulated Precision Clock home page Some of these parameters can also be adjusted via the VFD panel on the MPC MPC User Manual Rev 0D 61 6 Software Programs CONFIGURE ETHERNET PORT An example of the Configure Ethernet Port window is shown in Figure 58 Configure Ethernet parameters btn an P automatecally i Enter Sub Her Mack 0 0 0 Enter Gateway 0 0 0 Figure 58 Configure Ethernet Port Select whether to enter the IP address for the modem connection in the Set IP field or select Obtain an IP Automatically for the IP address to be assigned automatically If you selected the Set IP field enter the address of the system of interconnections within the communications system that allows the components to communicate directly with each other in the Enter Sub Net Mask field Enter the default gateway address in the Enter Default Gateway field Click on the OK button to save your changes or click on the Cancel button to cancel the settings and return you to the main Network Setup page Some of these parameters can also be adjusted via the VFD panel on the MPC 6 1 2 5 Receiver Setup Click on the Receiver Setup button in the main Configuration Setup window to bring you to the Receiver Setup window as seen in Figure 59 There are three options in this screen that are described further in this section Set Up Base Station List Current Configuration Parsi
44. PC User Manual Rev 0D 41 Chapter 5 VFD Menus group in an editable row to be underlined The left and right arrows move the cursor to the groups in the row The up and down arrows cycle through a list of choices for that group value An example of a group value that the cursor has been moved to is the PPP value shown in Figure 36 Press the ENTER key to return you to the top of the menu and save the new group value 5 2 Menus CONFIG MODEM PHONE 1 900 244 6262 PC COM 57600 8 NONE 1 PROTO TYPE PPP USRNAME USERNAME4 PASSWRD PASSWORD4 SOURCE AUTO IP NO IP ADDR 000 000 000 000 Figure 36 Edit Group Mode This section describes and graphically gives examples of the main menus and their sub menus 5 2 1 Status The STATUS functionality group provides diagnostic information about the MPC Its home screen gives you MPC s overall operational status and the current GMT time None of the rows in the column are editable Figure 37 shows the STATUS menus 42 MPC SYSTEMSTATUS 12 33 24 SUT DATE 1143 W 493408 S GPS GPS SYSTEM OK EXT OSC LOCKED LOGGING NOT ACTIVE SPACE 25946 MB COMPUTER PAT TEST4 POSITIONINFO a v gt POSTYPE SINGLE POINT LAT N 51 06 59 0557 LON W 114 02 17 9690 HEIGHT 1059 086 M MSL SATS 10 MPC RECEIVER INFO emn gt SERIAL SPA01240033 VERSION 1 210R1 MODEL RT2 UI VER 1 00 Figure 37 STATUS Menus MPC User Manual Rev 0D VFD Menus Chapter
45. S receiver or simply check the current receiver configuration Once you have reviewed the MPC receiver s current configuration return to the Receiver Setup page by clicking on the Home button or add edit a command by typing it in the Enter GPS Command field When you enter a command ensure to type in its complete syntax if necessary Only optional fields may be omitted For details on available commands please refer to Volume 2 of the OEM4 Users Guide Click on the Send button to send your command to the MPC The Command Response System Summary see Figure 47 on Page 53 appears with your commanded added at the bottom Click on the Home button to return to the Receiver Setup page Click on the List Current Configuration button to check your new receiver configuration or to add edit another command Click on the Refresh button at the bottom of the Rx Config from GPS screen at any stage to refresh the current configuration list WARNING The Euro4 GPS receiver communicates with the MPC main processor via COM1 Do not disturb the COM1 configuration or unexpected results may occur CONG on the Euro4 GPS receiver is connected to the DGPS port on the back of the MPC for general GPS input output MPC User Manual Rev 0D 63 Chapter 6 RX Config APFLICATICH CLOCRADRUST COM CUM IM CEMODOTH DATUM DOPSEPSEEMITIEL DOPXIIMEGUT Dora DTHWES BCUDOEE EXTEEHALCLOCE
46. Spurious 80 dBc Phase Noise 910 Hz 125 dBc Hz 9100 Hz 155 dBc Hz 91 kHz 165 dBc Hz RF Output Connector BNC Female FRONT PANEL 1PPS OUT Connector BNC Female Signal Description A one pulse per second normally high active low pulse 1 ms where the falling edge is the reference Output level Voltage High 2 0 VDC Low 0 55 VDC Min load impedance 1 KQ FRONT PANEL MARK IN Connector BNC Female Signal Description Normally high active low input pulse must exceed 50 ns in duration The falling edge is the reference LVTTL contact closure compatible Output Level Voltage High gt 2 0 VDC Low lt 0 8 VDC Min load impedance 1 KQ System calibration is required for Absolute Accuracy including antenna cables and MPC 8 MPC User Manual Rev 0D N Technical Specifications A 3 Port Pin Outs MPC User Manual Rev 0D Table 3 MPC COM Port Pin Outs Connector 25 DGPS Pino RS232 RS232 1 N C N C 2 RXD RXD 3 TXD TXD 4 N C N C 5 GND GND 6 N C N C 7 RTS RTS 8 CTS CTS 9 N C N C Appendix A 79 Appendix Technical Specifications A 4 Power Cable The power cable supplied with the MPC connects from the Power Input port on the back of the MPC to an external power source 100 to 240 VAC An input voltage of less than 100 VAC will cause the unit to suspend operation while an input voltage greater than 240 VAC
47. User Manual Rev 0D 101 NovAtel OM 20000072 Rev 0D 2002 03 27
48. a Hebe pue 5 2 1r Stalus i dete ben e MPC User Manual Rev 0D 5 2 2 60nh8cl e ers Ute 44 5 2 9 Configure cg nete o bar 45 5 2 4 Configure enne 46 5 2 5 Configure Modem Pea he at epe 47 5 2 6 Configure Direct 48 6 Software Programs 49 6 1 Modulated Precision Clock 49 50 63 2 Setup Configuration te vets 55 6 1 3 Arialysis PlOtS 67 6 1 4 Download Data 2g e edet eet 72 6 2 Firmware Upgrades amp sse 75 Appendices A Technical Specifications 76 B GPS Overview 81 C WAAS Overview 95 D Replacement Parts 97 MPC User Manual Rev 0D Figures 13 Typical MPC SetuP iaire aera 16 Close up of Connectors on Rear Panel 19 10 MHz In Out Data 20 MPG Front Panel videte actae eran eens eue e eee ee ea ege eu gag a 23 M d ms Moo cep 26 Modems Properties 27 Install New 27 Modem Installation Continued sese 28 Modem Installation Finish emen 28 Installed Modem Properties seen en
49. ache buffers to the hard drive and turn off the power at the power switch 5 23 Configure Client The CONFIG CLIENT menu allows you to enter information about the security rights for individuals using the system An example may be seen in Figure 39 CONFIG CLIENT USRNAME ABCDEFG PASSWRD TUVWXYZ ADMIN PRIV NO LOGGING CONTROL NO FTP ACCESS NO STATUS VIEW NO SUBMIT INFO NO Figure 39 Config Client Menus It is only necessary to use VFD menu the first time the MPC is used usually by any Administrator with full privileges User information can be added edited using the Modulated Precision Clock website See also Section 6 1 2 7 Set Up Users on Page 65 The CONFIG CLIENT menu contains the following information CONFIG CLIENT USRNAME A user ID in the form of a user name 8 characters MPC User Manual Rev 0D 45 Chapter 5 VFD Menus maximum The MPC allows multiple users Example of clients may be the administrator who has all privileges the users who have some but not all privileges and guests who have little or no privileges PASSWRD A password for the above user 8 characters maximum ADMIN YES or depending on whether this user has or has not respectively system privileges e LOGGING YES or depending on whether this user has or has not respectively the right to control logging FTP or depending on whether this user has or has not respecti
50. anual Rev 0D 76 Technical Specifications Appendix A A 2 MPC Specifications CARDS There 5 cards in the Euro4 GPS Computer Clock Power and Modem INPUT OUTPUT CONNECTORS GPS Antenna Input TNC female jack 50 O nominal impedance 4 25 to 45 25 V DC 90 mA max output from MPC to antenna LNA Frequency L1 1575 42 MHz L2 1227 6 MHz Power Input 3 pin A C chord provided for North American Standard A C Voltage 100 to 240 VAC Frequency 50 to 60 Hz Warm up power 34 W Typical power Fuse 1 5A DGPS DE9P connector PPP DE9P connector Ethernet RJ45 jack Modem RJ11 jack Individual BNC connectors are described on the next page Operating Temperature 40 C to 50 receiver Storage Temperature 45 C to 85 C Humidity Not to exceed 90 non condensing Size without handle 148 mm x 258 mm x 365 mm 6 x 10 x 15 Weight 6 35 kg 14 Ib a An Ethernet connection can only be made with an RJ45 cable An RJ11 cable will fit into the Ethernet port but a connection cannot be established MPC User Manual Rev 0D 77 Appendix Technical Specifications BACK PANEL 10 MHZ IN Connector BNC female Capture range 5 10 2 5 Hz Sensitivity 9 dBm to 20 dBm into 500 FRONT PANEL 10 MHZ OUT Short Term Stability Allen Variance 1 x 10772 1 day RF Output Power 10 3 dBm into 50 Q Output Waveform Sine wave Harmonics 15 dBc
51. any to do with voltage Also the RXHWLEVELS log refer to Volume 2 of the OEM4 Users Guide contains environmental and voltage parameters The data logging mechanism is designed to be robust and to endure power interruptions and similar disruptive events with minimum loss of data In this situation allow for your data to be possibly reduced by several seconds up to a maximum of a minute To the extent possible error messages attempt to describe the problem If you require further information on this topic please refer to the description of the RXSTATUS log in Volume 2 of the OEM4 Users Guide The MPC is designed for continuous operation However if you need to power down the unit it is recommended that you always use the MPC Shutdown Type menu see Page 45 Then give the internal operating system a few minutes to flush its cache buffers to the hard drive and turn off the power at the power switch For a listing of the required input supply voltages see Appendix A MPC Specifications on Page 77 For more information on the supplied 3 pin power cable see A 4 Power Cable on Page 80 MPC User Manual Rev 0D Setup Considerations Chapter 3 3 25 RF Port amp Cables The GPS Antenna In connector is bi directional in that it accepts RF signals from the antenna and it supplies DC power to the low noise amplifier LNA of an active antenna It has a TNC female connector Power to this port can be disabled via the ANT
52. ard category Figure 48 Logging Statistics Choose a Channel by clicking on its button Log summaries are shown line by line The following definitions apply LogSumL Specifies the channel number Log SumF Specifies the file name and location on the MPC LogSuml A log command or message that has occurred as a result of the current channel s schedule The log name is preceded by the num ber of times it has been received and recorded in the file It is then followed by a short definition LogSum On its own LogSum gives a count of the Total Binary Logs the Total ASCII logs or the Total Prompts or messages that have oc curred as a result of the current channel s schedule LogSumT Specifies the total number of logs command and prompts based on the LogSum lines above Click on the OK button to return you to the main Logging Control window Figure 45 on Page 50 6 1 2 Setup Configuration The Setup Configuration window allows you to configure your internet connection modify the name you give to your MPC check the receiver configuration and reconfigure your MPC using commands adjust services upload data and upgrade update the MPC firmware The Setup Configuration window can be seen in Figure 49 MPC User Manual Rev 0D 55 Chapter 6 Software Programs Setup Configuration NovAtel pat test Select Option Set MFC Hame Setup Email Server Disk Set Lin F
53. ard Deviation meters Time hours Latitude Longtitude Height This function is useful for obtaining the WGS84 position of a point to a reasonable accuracy without having to implement differential GPS It is interesting to note that even a six hour occupation can improve single point GPS accuracy from over fifty meters to better than five meters This improved accuracy is primarily due to the reductions of the multipath and selective availability errors in the GPS signal Again it is necessary to keep in mind that the resulting standard deviations of the position averaging can vary quite a bit especially over relatively short averaging times To illustrate the position averaging function was run for a period of one hour at three different times during the day The resulting standard deviation in latitude varied from 4 7 to 7 0 meters Similarly the variation in longitude and height were 4 9 to 6 7 meters and 10 9 to 12 5 meters respectively This degree of variation is common for averaging periods of less than 12 hours due to changes in the satellite constellation The graph however should at least provide some indication of the accuracy one may expect from single point position averaging 90 MPC User Manual Rev 0D GPS Overview Appendix B B 5 2 Dual Station Differential Positioning Itis the objective of operating in differential mode to either eliminate or greatly reduce most
54. as seen in Figure 64 Hew Uit User Hama Password Figure 64 Add New User 66 MPC User Manual Rev 0D Software Programs Chapter 6 Enter a username and password for the new user Then re enter the password in the Re Enter Password field to ensure you typed it in correctly Click on the Submit New User field to save the new user or on the Home button to disregard your changes and return to the main Set Up Users page 6 1 3 Analysis Plots The Analysis Plots Page gives you a choice of multiple plots in two formats Icons of the plot formats Time Plots and Sky Plots are shown in the Analysis Plots window as seen in Figure 65 frit Tone Fiets Shey Fies Figure 65 Select Analysis Plot Each of the plots has a Home button Click on the Home button to return you to the Modulated Precision Clock website home page or use your internet browser s back button to take you back to the plot that you last viewed 6 1 3 1 Time Plots When you click on the Time Plots icon in the Analysis Plots page a dialog appears as shown in Figure 66 that allows you to select a time plot of your choice and the time period for the plot MPC User Manual Rev 0D 67 6 Software Programs 68 Value Ta Flot Temaereture 5 Minute Go Temperature January 10 2002 00 REOR UTC 5 Minus Time Ern iur ee 1 De
55. ay is at the minimum about three metres for satellite signals arriving from 90 degrees above the horizon overhead and progressively increases as the angle above the horizon is reduced to zero where delay errors may be as much as 50 metres at the horizon e Ephemeris Errors Some degree of error always exists between the broadcast ephemeris predicted satellite position and the actual orbit position of the satellites These errors will directly affect the accuracy of the range measurement Satellite Clock Errors Some degree of error also exists between the actual satellite clock time and the clock time predicted by the broadcast data This broadcast time error will cause some bias to the pseudorange measurements e Receiver Clock Errors Receiver clock error is the time difference between GPS receiver time and true GPS time GPS receivers have differing clock offsets from GPS time that vary from receiver to receiver by an unknown amount depending on the oscillator type and quality TCXO vs OCXO etc However because a receiver makes all of its single point pseudorange measurements using the same common clock oscillator all measurements will be equally offset and this offset can generally be modeled or quite accurately estimated to MPC User Manual Rev 0D 87 Appendix GPS Overview effectively cancel the receiver clock offset bias Thus in single point positioning receiver clock offset is not a significant problem
56. can be configured using the menus on the front panel of the MPC A limited amount of the system status may also be viewed in these menus See Chapter 5 VFD Menus on Page 40 for more details How to set up the different ports for connection to the internet and then how to connect to the internet from each port is described in the following sections 4 2 31 Ethernet Connect The Network Administrator must use the Configure Ethernet menus as described in Section 5 2 4 Configure Ethernet on Page 46 to decide whether or not the IP address is assigned automatically via a Dynamic Host Configuration Protocol DHCP server on the local network intranet If AUTO IP in MPC User Manual Rev 0D 25 4 Using the the menu is changed to YES then the IP SUBNET and GATEWAY rows will be assigned automatically upon activation Connect an RJ45 cable from your local internet or intranet wall jack to the Ethernet port on the You may receive an IP address or a static IP location on your internal network intranet given by your Network Administrator to use as a URL An IP location associates an IP address with a name for example MPC1 in your Domain Name Server DNS Open your internet browser and connect to the internet on a PC In the Address field of your internet browser type in the IP address or static IP location to go to the Modulated Precision Clock website for your MPC The following URLs are fictional exa
57. carrier phase solution or 60 seconds for a pseudorange solution un less adjusted using the DGPSTIMEOUT command A general guideline for the additional error incurred due to the extrapolation process is shown in Table 4 Table 4 Latency Induced Extrapolation Error Time since lastreference Typical extrapolation station observation 0 2 seconds 1 cm sec 2 7 seconds 2 cm sec 7 30 seconds 5 cm sec MPC User Manual Rev 0D GPS Overview Appendix B B 5 Pseudorange Algorithms Pseudorange algorithms correlate the pseudorandom code on the GPS signal received from a particular satellite with a version generated within the reference station receiver itself The time delay between the two versions multiplied by the speed of light yields the pseudorange so called because it contains several errors between the reference station and that particular satellite The availability of four pseudoranges allows the reference station receiver to compute its position in three dimensions and the offset required to synchronize its clock with GPS system time The discrepancy between the reference station receiver s computed position and its known position is due to errors and biases on each pseudorange The reference station receiver sums these errors and biases for each pseudorange and then broadcasts these corrections to the remote station The remote receiver applies the corrections to its own measurements its
58. ces Sivit mE _ Cancel Figure 23 Start Remote Access Service You may see some service control messages before the Remote Access Admin dialog reappears with your connection status visible see Figure 24 um Vik AL ADAG Figure 24 Remote Access Admin 34 MPC User Manual Rev 0D Using the Chapter 4 On the taskbar select Start Administrative Tools Common Il User Manager for the User Manager dialog to appear as seen in Figure 25 Acdminstretar Built in account tor exdministerimg Administrators Members can fully administer computenidomein Figure 25 User Manager From its main menu select User New User and the New User dialog will appear as shown in Figure 20 Figure 26 New User Enter a User Name and Password that the MPC will use to sign on to your computer in bold uppercase letters only because only uppercase letters can be entered in the VFD screens in the Username and Password fields Re enter your password in the Confirm Password field You may also enter text in the Full Name field such as for easy identification Check in the Password Never Expires check box and then click on the Dialin button The Dialin information dialog will appear as seen in Figure 27 on Page 36 MPC User Manual Rev 0D 35 4 Using the 36 pom rpm gt User USERTAT FESTER dus Fe Grant goin user C
59. consists of 24 satellites in six 55 orbital planes with four satellites in each plane The orbit period of each satellite is approximately 12 hours at an altitude of 20 183 kilometers This provides a GPS MPC User Manual Rev 0D 81 Appendix GPS Overview receiver with at least six satellites in view from any point on earth at any particular time The GPS satellite signal identifies the satellite and provides the positioning timing ranging data satellite status and the corrected ephemerides orbit parameters of the satellite to the users satellites can be identified either by the Space Vehicle Number SVN or the Pseudorandom Code Number PRN The PRN is used by the NovAtel GPSCard The GPS satellites transmit on two L band frequencies one centered at 1575 42 MHz L1 and the other at 1227 60 MHz L2 The L1 carrier is modulated by the C A code Coarse Acquisition and the P code Precision which is encrypted for military and other authorized users The L2 carrier is modulated only with the P code B 1 2 The Control Segment The control segment consists of a master control station five reference stations and three data up loading stations in locations all around the globe The reference stations track and monitor the satellites via their broadcast signals The broadcast signals contain the ephemeris data of the satellites the ranging signals the clock data and the almanac data These signals are passed to the master cont
60. d Click on the Configure button next to the TCP IP check box and the RAS Server TCP IP Configuration dialog will appear as seen in Figure 19 Figure 19 RAS Server TCP IP Configuration Click in the Use This Computer Only field and then the Use Static Address Pool field Enter the Begin 32 MPC User Manual Rev 0D Using the Chapter 4 and End addresses as shown in Figure 19 on Page 32 Click on the OK button and the Remote Access Setup dialog will appear with your connection port device and type showing as in Figure 20 Hime Aceri Silip Type Emm Figure 20 Remote Access Setup From the taskbar select Start Programs Administrative Tools Common Remote Access Admin see Figure 21 g Toisaa jul Pesci Pingel gui Qo Tie dij Hacia ica Sofas Tma Ca Winzip qu WE FTF Pla Figure 21 Remote Access Admin Route MPC User Manual Rev 0D 33 4 Using the The Remote Access Admin dialog will appear as seen in Figure 22 1 Accar Adran gm Vib AL Total Patt Raros Acren Senica nol pated on tha osiected Figure 22 Remote Access Admin on PC From the main menu select Server Start Remote Access Service and the Start Remote Access Service dialog will appear as seen in Figure 23 Slat Remol Ac
61. default plot shown is the Constellation plot over 1 hour Select a plot type in the Graph Selection field Your choices are Constellation L1 Carrier to Noise Vs Elevation 2 Carrier to Noise Vs Elevation L1 Code Minus Carrier Vs Elevation e 2 Code Minus Carrier Vs Elevation MPC User Manual Rev 0D 69 6 Software Programs Next choose the time period for your plot The choices range from 1 hour up to a maximum of 7 days Click on the GO button to generate the plot In the Constellation plots each colour represents a satellite PRN An example is shown in Figure 70 Graph Selection Hour Go L1 Tz 2002 17 38 38 UTC Figure 70 Constellation Sky Plot In the Carrier to Noise and Code Minus Carrier versus Elevation plots each colour represents the minimum maximum and mean values of the data A colour key will be shown on each plot to explain the colours being displayed Examples are shown in Figures 71 and 72 on Page 71 plots are displayed PNG format 70 MPC User Manual Rev 0D Software Programs Chapter 6 Graph Selection Camer To Moise 1 Dey Go a Carrier to Februay 12 2002 17 21 36 UTC Code hiran Carrier 12 2002 18 03 5 11 Figure 72 L2 Code Minus Carrier Vs Elevation MPC User Manual Rev 0D 71 6 Software Prog
62. der as displayed by the VFD or provided by your MPC Administrator to use as a URL to go to the Modulated Precision Clock website for your MPC receiver using a PC The following is a fictional example http 123 123 123 123 Your Network Administrator may wish to provide you with STATIC IP location on your internal network intranet and associate this IP address with a name for example MPC1 in your Domain Name Server DNS In this case you would access your MPC s web page via the URL http mpc1 9 Browse to the Modulated Precision Clock website 10 The Modulated Precision Clock website for your MPC now becomes your user interface where you can set up logging modify configurations view logging summaries and plots and download data The sections of Chapter 3 MPC Setup Considerations starting on Page 18 give further details on Steps 2 to 5 while Chapter 5 Menus starting on Page 40 gives details on the menus in Steps 6 amp 7 Section 4 2 Configuring the Network starting on Page 25 helps with Step 6 and Modulated Precision Clock Website on Page 49 is devoted to Steps 8 and 9 The MPC is designed for continuous operation However if you need to power down the unit it is recommended that you always use the MPC Shutdown Type menu see Page 45 Then give the internal operating system a few minutes to flush its cache buffers to the hard drive and turn off the power at the p
63. e 501 antenna model A031 Optional NovAtel GPSAntenna Model 600 series dual or single frequency active antennas designed for high accuracy applications without the need for a choke ring Optional NovAtel Model C005 C015 or C030 coaxial antenna cable in 5 m 16 47 15 m 49 25 or 30 m 98 4 lengths Optional serial cables for compatibility with certain data communications devices to the DGPS or PPP ports User supplied RJ11 cable for the Modem port connector User supplied RJ45 cable for the Ethernet port connector Should you need to order an accessory or a replacement part NovAtel part numbers are shown in Appendix D on Page 97 Not all of the above accessories are available from NovAtel MPC User Manual Rev 0D 15 Chapter 2 Setting up the MPC is a straightforward process whether you are in the field collecting data or back at the office configuring the or transferring collected data to your PC for post processing CAUTION See the cautions on Page 11 of the Notices for a list of items you should be aware of as you set up and use the MPC Figure 2 displays how you might typically set up the MPC at the office for example as a base to set up other receivers in the grid or to transfer collected data from other receivers to the base MPC or as a stand alone receiver In these situations the MPC is connected to the internet and energy is supplied by means of a power source in the range 100 to 240 VAC No matte
64. e Province of Alberta Canada Each of the parties hereto irrevocably attorns to the jurisdiction of the courts of the Province of Alberta MPC User Manual Rev 0D 8 Warranty Policy NovAtel Inc warrants that its Global Positioning System GPS products are free from defects in materials and workmanship subject to the conditions set forth below for the following periods of time MPC Receiver One 1 Year GPSAntenna Series One 1 Year Cables and Accessories Ninety 90 Days Software Support One 1 Year Date of sale shall mean the date of the invoice to the original customer for the product NovAtel s responsibility respecting this warranty is solely to product replacement or product repair at an authorized NovAtel location only Determination of replacement or repair will be made by NovAtel personnel or by technical personnel expressly authorized by NovAtel for this purpose THE FOREGOING WARRANTIES DO NOT EXTEND TO I NONCONFORMITIES DEFECTS OR ERRORS IN THE PRODUCTS DUE TO ACCIDENT ABUSE MISUSE OR NEGLIGENT USE OF THE PRODUCTS OR USE IN OTHER THAN A NORMAL AND CUSTOMARY MANNER ENVIRONMENTAL CONDITIONS NOT CONFORMING TO NOVATEL S SPECIFICATIONS OR FAILURE TO FOLLOW PRESCRIBED INSTALLATION OPERATING AND MAINTENANCE PROCEDURES II DEFECTS ERRORS OR NONCONFORMITIES IN THE PRODUCTS DUE TO MODIFICATIONS ALTERATIONS ADDITIONS OR CHANGES NOT MADE IN ACCORDANCE WITH NOVATEL S SPECIFICATIONS OR AUTHORIZED BY NOVATEL
65. e internet using these connections and the Modulated Precision Clock website See also Section 4 2 Configuring the Network on Page 25 and Chapter 5 Menus on Page 40 3 2 3 1 PPP The Point to Point Protocol PPP connector is an RS232 communications port to support TCP IP communication using a Direct Connection to a user supplied computer See also Section 4 2 2 Modem or Direct Connect PPP Client on Page 26 The PPP connector provides a direct TCP IP data link from the MPC to a computer that supports this protocol For further information on the signals or connector pin outs for this serial port please see Section Port Pin Outs on Page 79 3 2 8 2 Ethernet Connect to the internet from this port using a Patch RJ45 cable See also Section 4 2 1 Ethernet Connect on Page 25 3 2 3 3 Modem The MPC contains an internal modem You can connect to the MPC by phoning in from your computer modem or you can configure the MPC to phone out to an Internet Service Provider or internal network intranet See also Section 4 2 2 Modem or Direct Connect PPP Client on Page 26 Use a Patch RJ11 cable to connect the MPC from the Modem port to the telephone system MPC User Manual Rev 0D 21 Chapter 3 MPC Setup Considerations 3 2 4 Power 22 After initial connection of the power source to the receiver and pressing the power switch on the back of the unit see Figure 3 on Page 19 the Power LED on the front of the MPC
66. e station receiver the rates at which data is transmitted through the various links and the computing speed of the remote station the overall delay is on the order of one second Furthermore this position cannot be computed any more often than the observations are sent from the reference sta tion Typically the update rate is one solution every two seconds The low latency position solution is based on a prediction from the reference station Instead of waiting for the observations to arrive from the reference station a model based on pre vious reference station observations is used to estimate what the observations will be at a given time epoch These estimated reference station observations are combined with actual measurements taken at the remote station to provide the position solution Because only the reference station observations are predicted the remote station s dynamics will be accurate ly reflected The latency in this case the time delay between the moment that a measure ment is made by the remote station and the moment that a position is made available is determined only by the remote processor s computational capacity the overall delay is of the order of a hundred milliseconds Low latency position solutions can be computed more often than matched position solutions the update rate can reach 10 solutions per second The low latency positions will be provided for data gaps between matched positions of up to 30 seconds for a
67. ell Beck I Hn Call Back Sei By Figure 27 Dialin Information Check the Grant Dialin Permission to User check box and click in the No Call Back field Click on the OK button Restart your PC for the new settings to take effect Ensure your MPC is powered on At the MPC VFD screen use the navigation button to go to the CONFIG DIRECT or CONFIG MODEM menu Set up a client as described in Section 5 2 3 Configure Client on Page 45 If you have a PPP connection use the MPC navigation buttons to go to the CONFIG DIRECT menu see also Section 5 2 6 Configure Direct PPP on Page 48 Or if you have a modem connection use the MPC navigation buttons to go to the CONFIG MODEM menu see also Section 5 2 5 Configure Modem on Page 47 Examples of both menus are shown in Figure 28 CONFIGDIRECT Je v gt CONFIG MODEM CLIENT 4 19002446262 115200 8NONE1 N 57600 8 NONE 1 N TYPE PPP TYPE PPP USERTRY USERTRY TESTER TESTER AUTO IP YES AUTO IP YES 000 000 000 000 000 000 000 000 Figure 28 Config Direct and Modem Menus Select your protocol PROTO as PPP Enter the same User Name and Password that you set up for MPC to dial in to your computer In the SOURCE row select AUTO IP YES Use the MPC navigation buttons to go to the MPC CONNECT menu see also Section 5 2 2 Connect on Page 44 An example of the MPC CONNECT menu is shown in Figure 29 MPC CONNECT MENU 60 v CONNECTED
68. erivative works of the software 3 use the software in connection with computer based services business or publicly display visual output of the software 4 transmit the software over a network by telephone or electronically using any means or 5 reverse engineer decompile or disassemble the software You agree to keep confidential and use your best efforts to prevent and protect the contents of the software from unauthorized disclosure or use 4 Term and Termination This Agreement is effective until terminated You may terminate it at any time by destroying the software including all computer programs and documentation and erasing any copies residing on computer equipment If you do so you should inform NovAtel in writing immediately This Agreement also will terminate if you do not comply with any of its terms or conditions Upon such termination you are obligated to destroy the software and erase all copies residing on computer equipment NovAtel reserves the right to terminate this Agreement for reason of misuse or abuse of this software 5 Warranty For 90 days from the date of shipment NovAtel warrants that the media for example diskette on which the software is contained will be free from defects in materials and workmanship This warranty does not cover damage caused by improper use or neglect NovAtel does not warrant the contents of the software or that it will be error free software is furnished AS IS and without warranty
69. every satellite pair it is called the reference satellite and it is generally the one with the highest elevation In this way if there are n satellites in view by both receivers then there will be n satellite pairs The difference between receivers A and B removes the correlated noise effects and the difference between the different satellites removes each receiver s clock bias from the solution In the system a floating or continuous valued ambiguity solution is continuously generated from a Kalman filter When possible fixed integer ambiguity solutions are also computed because they are more accurate and produce more robust standard deviation estimates Each possible discrete ambiguity value for an observation defines one Jane that is each lane corresponds to a possible pseudorange value There are a large number of possible lane combinations and a receiver has to analyze each possibility in order to select the correct one For single frequency receivers there is no alternative to this brute force approach However one advantage of being able to make both L1 and L2 measurements is that linear combinations of the measurements made at both frequencies lead to additional values with either wider or narrower lanes Fewer and wider lanes make it easier for the software to choose the correct lane having used the floating solution for initialization Once the correct wide lane has been selected the software searches for the
70. glows red The PWR button on the keypad is used to access the MPC Shutdown Type screen in the VFD menus see Pages 45 Choosing REBOOT will cause the embedded PC to reboot Choosing POWERDOWN will terminate the programs running on the embedded PC and cause the PC buffers to be flushed to the hard drive The keypad will be unusable again until the power switch is turned off then on and the VFD is visible again The VFD display will screen save and appear black after 5 minutes of inactivity Hit any key on the VFD keypad for it to be restored The MPC requires an input supply voltage that comes from a normal power source of 110 220 volts at 50 60 Hz AC through its 3 pin power connector The MPC has an internal power module that does the following filters and regulates the supply voltage protects against over voltage over current and high temperature conditions provides automatic reset circuit protection A WARNING 1 Supplying the MPC with an input voltage that is below 100 VAC will cause the unit to suspend operation An input voltage above 240 VAC may physically damage the unit 2 Disconnect the power source before servicing the power connector s 1 5 Amp fuse The Power Input connector on the MPC contains a 1 5 Amp fuse that can be serviced as long as the MPC is disconnected from power As is also described on Page 42 the GPS row in the MPC System Status screen of the VFD menus provides information and error messages including
71. has the following standard features NovAtel s advanced 11 12 GPS technology in its Euro4 card Capability to log up to 19 GB of data on its hard disk Capability to execute scheduled logging on its hard disk Vacuum Fluorescent Display VFD panel and keypad for on the fly data information and configurations 4 internet intranet connect options ethernet direct PPP modem client or modem host 1 DGPS RTK communications port L1 L2 differential broadcasts Field upgradeable firmware program software What makes one model different from another is software not hardware This unique feature means that the firmware can be updated anytime anywhere without any mechanical procedures whatsoever For example a model with L1 L2 only capabilities can be upgraded to a model with L1 L2 WAAS in only a few minutes at your installed location instead of the days or weeks that would be required if the receiver had to be sent to a service depot that is required to unlock the additional features is a special authorization code and internet or intranet accessibility Please see Section 6 2 MPC Firmware Upgrades amp Updates on page 75 for a description on how your MPC is upgraded updated via the web MPC User Manual Rev 0D Introduction Chapter 1 1 2 ACCESSORIES AND OPTIONS The MPC can be used with the following accessories Power cable to connect the MPC to a 110 or 220 VAC power source An optional choke ring is available for th
72. he two ranges represents the combined pseudorange measurement errors resulting from receiver clock errors atmospheric delays satellite clock error orbital errors and SA The reference station will derive pseudorange corrections for each satellite being tracked These corrections can now be transmitted over a data link to one or more remote stations It is important to ensure that the reference station s FIX POSITION setting be as accurate as possible as any errors here will directly bias the pseudorange corrections computed and can cause unpredictable results depending on the application and the size of the reference station position errors As well the reference station s pseudorange measurements may be biased by multipath reception 5 22 The Remote Station A remote station is generally any receiver whose position is of unknown accuracy but has ties to a reference station through an established data link If the remote station is not receiving differential corrections from the reference station it is essentially utilizing single point positioning measurements for its position solutions thus is subject to the various GPS system biases However when the remote GPS receiver is receiving a pseudorange correction from the reference station this correction is applied to the local receiver s measured pseudorange effectively cancelling the effects of orbital and atmospheric errors assuming baselines 50 km as well as eliminating satellite c
73. iecetvar Set Lip Firmware Setup Users Figure 49 Set Up Configuration 6 1 2 1 Set MPC Name Click on the General Setup button for the Modify Receiver Parameters window to appear as seen in Figure 50 on Page 56 Modify Receiver Network Name Enter Mew Hame a 450504 Enter UDP IL number 0 4 4 Figure 50 General Receiver Setup The Receiver Name is a name you give your MPC that is meaningful to you This name will also appear in the main Modulated Precision Clock windows Logging System Summary Response Setup and Analysis Plots The Enter UDP Unique ID number field allows you to give your MPC a unique 56 MPC User Manual Rev 0D Software Programs Chapter 6 ID number which is imbedded in the UDP data stream if used see Section 6 1 1 1 Logging Setup on Page 51 It uniquely identifies the messages as originating from your Click on the Go button to save your changes 6 1 22 Set Up E Mail Server If you intend to transfer collected data files via an e mail attachment you must set up e mail server information through The Set Up E Mail Server page as seen in Figure 51 Modify E Mail Server Information Erie UBL of Email Server cseeeice net Verl fer Email Server Go Figure 51 Set Up E Mail Server Type in the URL of the e mail server in the Enter URL of Email Server field The Enter UserID For Email Server field allows
74. igure 53 Delete Files CGPSServerlog C GrapherServer log Logger3erver log C MPGGuiServer bag _ Dem SystamLogiies Choose GPSWeek GPs Calendar Cancel Figure 53 Delete Files The log checkboxes in the top half of the dialog allow you to select log files for deletion These log files contain messages and information on different parts of your MPC as seen below GPSServer GPS Card GrapherServer MPC Plots LoggerServer Logging Setup and Logged Files MPCGuiServer VFD Panel These types of files are on the MPC s ftp site or root directory and may be requested by Customer 58 MPC User Manual Rev 0D Software Programs Chapter 6 Service if you have any MPC questions or problems Files that become too large can be selected here and then deleted by clicking on the Delete System Log Files button The bottom half of the Delete Files dialog allows you to choose a week number by clicking on one of the available GPS weeks button If you need to refer to a calendar of GPS weeks click on the GPS Calendar button first A description of the GPS Calendar is given in Section 6 1 4 Download Data on Page 72 When you have clicked on a GPS week s button a dialog will appear showing the files available for deletion see Figure 54 Choose Files to Delete GPS Week 1132 mgpcbmglzt z sc bm Figure 54 Choose Files to Delete Select a file for deletion and click in its check box Choose more than one file if a
75. information on the signals or connector type for the 10 MHz In and 10 MHz Out ports please see Appendix A Input Output Connectors on Page 78 3 2 2 DGPS A data serial cable is needed to connect the MPC from the DGPS connector to an external device The Differential GPS DGPS communication port is bi directional and factory configured for RS232 It is typically used to communicate DGPS broadcast data to transmitting radio equipment For communication to occur the MPC serial port configuration must match that of the external 20 MPC User Manual Rev 0D Setup Considerations Chapter 3 device s The MPC s default port settings are RS232 9600 BPS no parity 8 data bits 1 stop bit no handshaking and echo off Changing the default settings can be easily accomplished by means of the COM command which is described in Volume 2 of the OEM4 Users Guide For information on issuing commands to the MPC via the Modulated Precision Clock website see List Current Configuration on Page 63 For further information on the signals or connector pin outs for this serial port please see Section Port Pin Outs on Page 79 See Appendix D Replacement Parts on Page 97 if you need to consult a list of NovAtel part numbers 3 2 3 Network I O In the Network I O group of connectors there is an RJ11 Modem jack an RJ45 Ethernet jack and an RS232 PPP port Data and receiver information can be viewed configured and downloaded via th
76. ing satellites properly The GPS row in the MPC System Status screen of the VFD menus provides status information see Page 42 Oscillator This LED glows blue when the internal OCXO is powered on MPC User Manual Rev 0D 23 Chapter 3 MPC Setup Considerations 3 3 1 VO Connectors and Cables 24 Below the screen on the front of MPC three BNC female connectors 10 MHz Out IPPS Out and Mark In 3 3 1 1 10 MHz Output The 10 MHz output provides a high stability reference 10 MHz frequency that is by default phase locked to GPS time It permits the synchronization of other equipment requiring an extremely stable reference signal of 10 MHz See also Figure 4 on Page 20 The steering of the internal OCXO is controlled by the CLOCKADJUST EXTERNALCLOCK and CLOCKCALIBRATE commands The status of the clock steering process is provided by the CLOCKSTEERING log and the time history plots on the Modulated Precision Clock website Refer to Volume 2 of the OEM4 Users Guide for more information on these commands and logs For details on time plots please see Section 6 1 3 1 Time Plots on Page 67 3 3 1 2 1PPS Output Upon determination of position time the receiver will align the one pulse per second 1PPS signal to the GPS epoch Its specifications and electrical characteristics are described in Front Panel 1PPS Out on Page 78 From this time onwards the 1PPS triggers every second By default the OCXO frequency is adjusted to
77. ing solution generally increases with the number of satellites which can be simultaneously viewed by both the reference and remote station receivers As well the quality of the positioning solution increases if the distribution of satellites in the sky is favorable this distribution is quantified by a figure of merit the Position Dilution of Precision PDOP which is defined in such a way that the lower the PDOP the better the solution Due to the many different applications for differential positioning systems two types of position solutions are possible NovAtel s carrier phase algorithms can generate both matched and low latency position solutions while NovAtel s pseudorange algorithms generate only low latency solutions These are described below 1 The matched position solution is computed at the remote station when the observation in formation for a given epoch has arrived from the reference station via the data link Matched observation set pairs are observations by both the reference and remote stations which are matched by time epoch and contain the same satellites The matched position solution is the most accurate one available to the operator of the remote station but it has an inherent latency the sum of time delays between the moment that the reference station makes an observation and the moment that the differential information is processed at the remote sta tion This latency depends on the computing speed of the referenc
78. int the remote station are sought with respect to a GPS receiver at a known point the reference station The concept is illustrated in Figure 82 on Page 85 The relative position accuracy of two receivers locked on the same satellites and not far removed from each other up to tens of kilometers is extremely high The largest error contributors in single point positioning are those associated with SA and atmospheric induced effects These errors however are highly correlated for adjacent receivers and hence cancel out in relative measurements Since the position of the reference station can be determined to a high degree of accuracy using conventional surveying techniques any differences between its known position and the position computed using GPS techniques can be attributed to various components of error as well as the receiver s clock bias Once the estimated clock bias is removed the remaining error on each pseudorange can be determined The reference station sends information about each satellite to the remote station which in turn can determine its position much more exactly than would be possible otherwise The advantage of relative positioning is that much greater precision presently as low as 2 mm depending on the method and environment can be achieved than by single point positioning In order for the observations of the reference station to be integrated with those of the remote station relative Environment Canada
79. international Fax 403 295 4901 E mail support novatel ca Website http www novatel com Write NovAtel Inc Customer Service Dept 1120 68 Avenue NE Calgary AB Canada 2 855 Before contacting NovAtel Customer Service regarding software concerns please do the following Install the MPC on the internet with a fixed IP address or phone number so that NovAtel Customer Service can access it directly Also supply your IP address or phone number to NovAtel Customer Service You may be requested to send Customer Service any log files that appear in your MPC s ftp site or your root directory MPC User Manual Rev 0D 10 The following notices apply to CSA NOTICE Each MPC unit has been tested by a Canadian Standards Association CSA inspector and found to comply with the special Inspection Requirements of Electrical Equipment More specifically this equipment has been tested for Dielectric strength up to 1000 VAC The supplied AC electric cord is also approved and must be used with this equipment at all times The primary fuse rating must be strictly adhered to as labelled on the rear of the unit near the fuse holder Each MPC unit must have the CSA approved label attached on the rear of the unit CAUTION 1 This device incorporates circuitry to absorb most static discharges However severe static shock may cause inaccurate operation of the unit Use anti static precautions where possib
80. ion is available in this model This model can output the WAAS data in log format RAWWAASFRAMEA B WAASOA B WAAS27A B and can incorporate these corrections to generate differential quality position solutions Standard WAAS EGNOS data messages are analyzed based on RTCA standard DO 229B Change 1 Minimum Operational Performance Standards for GPS W AAS airborne equipment A WAAS EGNOS capable MPC will permit anyone within the area of coverage to take advantage of its benefits C 1 1 WAAS Commands and Logs 96 The command WAASCORRECTION enables the use of the WAAS corrections in the position filter In order to use this command first ensure that your receiver is capable of receiving WAAS corrections Several WAAS specific logs also exist and are all prefixed by the word WAAS except for the RAWWAASFRAME log The PSRDIFFSOURCE command sets the station ID value which identifies the reference station from which to accept psuedorange corrections All DGPS types may revert to WAAS if enabled using the WAASCORRECTION command Consult Volume 2 of the OEM4 Users Guide for more details on individual WAAS commands logs MPC User Manual Rev 0D Appendix D Replacement Parts The following are a list of the replacement parts available for your NovAtel GPS receiver Should you require assistance or need to order additional components please contact your local NovAtel dealer or Customer Service representative Table 5 MPC Power
81. ith each other GATEWAY The address of the device that will transfer messages out of the local network to the internet COMPUTER Give your MPC a network name 8 characters maximum 5 25 Configure Modem The CONFIG MODEM functionality group allows you to configure the internal modem connection with the MPC Figure 41 on Page 47 shows the CONFIG MODEM menus CONFIG MODEM PHONE 19002446262 PC COM 57600 8 NONE 1 N PROTO TYPE PPP USRNAME USERNAME4 PASSWRD PASSWORD4 SOURCE AUTO IP NO IP ADDR 000 000 000 000 CFG MODEM HOST ASSIGN ASSIGN IP NO IP START 000 000 000 000 IP STOP 000 000 000 000 Figure 41 Config Modem Menus As seen from Figure 41 there are two CONFIG MODEM menus One is for a client connection see also Section 4 2 2 Modem or Direct Connect PPP Client on Page 26 and the other is for a host connection e CONFIG MODEM Client PHONE The phone number of the service that the MPC is to call PC COM The communication parameters for the MODEM port PROTO The network protocol The two choices are Point to Point PPP or Serial Line Internet SLIP Protocol USRNAME The client user name on the remote network PASSWRD The password for the above client e SOURCE YES depending on whether or not respectively the IP address is assigned automatically by the host computer If AUTO IP is changed to YES then the IP row will not be editable and anything in the IP A
82. le 2 This device is a precision instrument Although it is designed for rugged operating conditions it performs best when handled with care 3 The MPC can accept an input supply voltage in the range 100 to 240 VAC This may not be the same range as other NovAtel products with which you are familiar Operating the MPC below 100 VAC causes the unit to suspend operation An input voltage above 240 VAC may physically damage the unit 4 Drawing more than the specified maximum current 1 5 amp may cause the internal fuse to interrupt the current Restoring normal operation will require replacing the fuse MPC User Manual Rev 0D 11 Foreword Congratulations Congratulations on your purchase of the Modulated Precision Clock NovAtel is an industry leader in state of the art GPS receiver design We believe that our MPC will meet your high expectations and are working hard to ensure that future products and enhancements will maintain that level of satisfaction This is your primary hardware and software reference Scope This manual contains sufficient information on the installation and operation of the MPC and its software to allow you to effectively integrate and fully operate it It is beyond the scope of this manual to provide details on service or repair Contact your local NovAtel dealer for any customer service related inquiries see Customer Service on Page 10 After the addition of accessories an antenna and a p
83. lock error The remote station must be tracking the same satellites as the reference station in order for the corrections to take effect Thus only common satellite pseudoranges will utilize the differential corrections When the remote is able to compute its positions based on pseudorange corrections from the reference station its position accuracies will approach that of the reference station Remember the computed position solutions are always that of the GPS receiving antenna phase centre 92 MPC User Manual Rev 0D GPS Overview Appendix B B 6 Carrier Phase Algorithms Carrier phase algorithms monitor the actual carrier wave itself These algorithms are the ones used in real time kinematic RTK positioning solutions differential systems in which the remote station possibly in motion requires reference station observation data in real time Compared to pseudorange algorithms much more accurate position solutions can be achieved carrier based algorithms can achieve accuracies of 1 2 cm CEP Kinematic GPS using carrier phase observations is usually applied to areas where the relation between physical elements and data collected in a moving vehicle is desired For example carrier phase kinematic GPS missions have been performed in aircraft to provide coordinates for aerial photography and in road vehicles to tag and have coordinates for highway features This method can achieve similar accuracy to that of static carrier phase if the
84. mples http 123 123 123 123 http mpcl You can monitor your connection status in the Connect menu described in Section 5 2 2 Connect on Page 44 Details on the Modulated Precision Clock website login and features can be found in Section 6 1 starting on Page 49 4 2 2 Modem or Direct Connect PPP Client Use the Configure Modem menus as described in Section 5 2 5 Configure Modem on Page 47 or the Configure Direct menu as described in Section 5 2 6 Configure Direct PPP on Page 48 to set up the modem direct connection Then decide whether or not the IP address is assigned automatically for the MPC If AUTO IP in the CONFIG MODEM or CONFIG DIRECT menu is changed to YES then the IP row will be assigned automatically upon activation Connect an RJ11 cable from a phone jack to the Modem port on the MPC or an RS232 cable from the PPP port on the MPC to a COM port on your PC In order to install a modem or PPP connection for your PC follow the rest of this section On your PC select Start Settings Control Panel from the taskbar and click on the Modems icon as seen in Figure 6 Modems Figure 6 Modems Icon 26 MPC User Manual Rev 0D Using the Chapter 4 The Modems Properties dialog will appear as seen in Figure 7 Figure 7 Modems Properties Click on the Add button to install the modem or PPP connection and the Install New Modem dialog will appear as seen in Figure 8 Hee Modem
85. mum time is set to less than 1 hour positions will be averaged once per minute and the standard deviations reported in the log will likely not be accurate also the optional horizontal and vertical standard deviation limits cannot be used If the maximum time that positions are to be measured is set to 24 for example you can then log AVEPOS with the trigger ontime to see the averaging status i e posave 24 log avepos onchanged You could initiate differential logging then issue the POSAVE command followed by the SAVECONFIG command This will cause the GPSCard to average positions after every power on or reset then invoke the FIX POSITION command to enable it to send differential corrections The position accuracy that may be achieved by these methods will be dependent on many factors SA average satellite geometry sky visibility at antenna location satellite health time of day etc The following graph summarizes the results of several examples of position averaging over different time periods The intent is to provide an idea of the relationship between averaging time and position accuracy All experiments were performed using a single frequency receiver with an ideal antenna location see Figure 83 MPC User Manual Rev 0D 89 Appendix GPS Overview Figure 83 Single Point Averaging This graph represents typical results using position averaging 35 30 m a Stand
86. n 29 Connection Properties ete ose ter e e t Ee et Ee viele 29 Network 30 Network Services 30 Select Network Service nnne nennen entere 31 Addi RAS DEVICE D 31 Configure Port Usage 31 Network Configuration 32 RAS Server TCP IP 32 Remote Access SetUp bg e tap Ei nu 33 Remote Access Admin Route 33 Remote Access Admin on sse 34 Start Remote Access Service 34 Remote Access ttn n RE ees 34 35 New USGr sete 35 Dialin 36 Config Direct and Modem 36 Connect 36 Eoading SCree eis eee en mee ette 37 Website Password 2 2 12 aaa 37 GONFIG GEIENT cote eere ttt eed 38 VED ATGa8S ERU DUE E coo See rd 40 Opening Menu i eee etc 41 Edit Digit Mode eie 41 Edit Group MOGde iunt tet a rues 42 STATUS MENUS E E 42
87. n on to the host computer PASSWRD The password for the above user e SOURCE YES depending on whether or not respectively the IP address is updated automatically If AUTO IP is changed to YES then the IP row will not be editable and anything in the IP ADDR row will be deleted ADDR The internet protocol IP address 48 MPC User Manual Rev 0D Chapter 6 Software Programs 6 1 The MPC software for the Euro4 GPSCard and the VFD are already installed The Modulated Precision Clock website is accessible on a PC via an internet connection It is your source for setup logging system summaries and analysis plots Details are given in Section 6 1 Modulated Precision Clock Website starting below Please see Section 6 2 MPC Firmware Upgrades amp Updates starting on Page 75 for a description on how your MPC is upgraded updated via the web See also Customer Service on Page 10 Modulated Precision Clock Website To access the Modulated Precision Clock home page use the IP address given by your internet provider as displayed by the VFD or provided by your Network Administrator to use as a URL for your MPC receiver using a PC The following is a fictional example http 123 123 123 123 Your Network Administrator may wish to provide you with a STATIC IP location on your internal network intranet and associate this IP address with a name for example in your
88. n the GPS signals L1 FLOAT The position is from floating ambiguity estimates that converge over time ON FREE FLOAT NARROW FLOAT e L1 INTEGER The position is from carrier phase ambiguity estimates that are only allowed to take on integer values WIDE INTEGER NARROW INTEGER LAT The current latitude in degrees minutes seconds and decimal seconds to 4 decimal places MPC User Manual Rev 0D 43 Chapter 5 VFD Menus LON The current longitude in degrees minutes seconds and decimal seconds to 4 decimal places HEIGHT The current mean sea level MSL height in meters to 3 decimal places SATS The number of GPS satellites currently being tracked MPC RECEIVER INFO SERIAL The GPSCard serial number VERSION The GPSCard firmware version MODEL The GPSCard model UI VER Shows the current version of the VFD user interface software 5 22 Connect The CONNECT function menu allows you to view the GPSCard s current connection status with three other devices Figure 38 shows the MPC CONNECT MENU screen MPC CONNECT MENU CONNECTED 198 161 68 216 CONNECT NO 000 000 000 000 CONNECT NO DSTATUS 000 000 000 000 MPC SHUTDOWN TYPE EXECUTE TYPE REBOOT Figure 38 MPC Connect Menu As seen in Figure 36 there are two Connect functionality menus MPC CONNECT MENU e ENET NO a connection status message depending on whether there is or is not respectively a connecti
89. ndix A Technical Specifications A 1 MPC Performance Position Accuracy 2 Standalone EE 1 only 1 8m L1 L2 1 5 m CEP WAAS L1 only 1 2 m CEP L1 L2 0 8 m CEP Code Differential 0 45 m CEP Post Processed 5 mm 1 ppm CEP Time To First Fix 15 minutes due to OCXO warm up Reacquisition 0 5 s L1 typical 6 s L2 typical Data Rates Raw Measurements 20Hz Computed Position 20 Hz Measurement Precision C A code phase 6 cm RMS L1 carrier phase Differential 0 75 mm RMS L2 P code 25 cm RMS L2 carrier phase Differential 2 mm RMS Internal OCXO Type 10 MHz SC Cut temperature stabilized Aging 5 x 10 per day Phase Noise L f 910 Hz 125 dBc Hz max 9100 Hz 155 dBc Hz max 91 KHz 165 dBc Hz max 910 KHz 165 dBc Hz Temperature Stability 10 ppb Mechanical Tuning Range 1 x 10 Electrical Steering Range 1 x 107 PLL to GPS Network can be disabled Type 274 Order Bandwidth 0 003 Hz Time Constant 5 mins Front Panel 10 MHz Out t 1 x 107 per day steered Front Panel 1PPS Out 10 ns RMS steered Onboard Data Storage 19 GB a Typical values Performance specifications are subject to GPS system characteristics U S DOD operational degradation ionospheric and tropospheric conditions satellite geometry baseline length and multipath effects Assumes SA Off b Time accuracy does not include biases due to RF or antenna delay c With respect to GPS system time MPC User M
90. ng u de Figure 66 Choose Value to Plot Against Time The default plot shown is the Temperature Vs Time plot over 5 minutes Select a value to plot against time in the Choose Value to Plot field Your choices are Temperature GDOP OEM4 Idle Time Number of Satellites Clock Error Clock Steering Next choose the time period for your plot The choices range from 5 minutes up to a maximum of 10 years Click on the GO button to generate the plot An example of a Temperature Vs Time plot over a 6 hour time span is shown in Figure 67 MPC User Manual Rev 0D Software Programs Chapter 6 Choose Value Plot Temperature E Hour Barana Taner denver 16 2000 T5 35 5pnin Hour Aver 1 Ayer Figure 67 Time Plot Example Figure 68 shows the key that is displayed with each plot It is a key of how the points in the plot are portrayed 10s Sample SminAverage 1 Hour Average 1 Day Average Figure 68 Time Plot Key plots are displayed in PNG format 6 1 3 2 Sky Plots When you click on the Sky Plots icon in the Analysis Plots screen see Figure 65 on Page 67 a dialog appears with fields that allows you to select a sky plot of your choice and the time period for the plot The fields are shown in Figure 69 below Graph Selection Constellation Figure 69 Choose Sky Plot The
91. ng Responses Select Option Setup Station List Curent Configuration Parsing Responses _ Figure 59 Receiver Setup 62 MPC User Manual Rev 0D Software Programs Chapter 6 SET UP BASE STATION To set up your MPC as a base station click on the Set Up Base Station button in the Receiver Setup dialog see Figure 59 to bring you to the List Current Configuration window where you can enter GPS commands See also List Current Configuration starting on Page 63 To fix the position for your MPC base enter the Latitude Longitude and Height using the FIX command If you do not fix the base station position the current position is computed by the MPC Use the Set Up Logging window to enter the RTCA RTCM or CMR messages that your base station will transmit See also Section 6 1 1 1 Logging Setup on Page 51 For more information on base station commands and logs please refer to Volume 2 of the OEM4 Users Guide PARSING RESPONSES SETUP The Parsing Responses page is also available through the main Logging window See Section 6 1 1 2 Parsing Responses on Page 53 LIST CURRENT CONFIGURATION The Set Up Logging screen see Figure 46 on Page 51 is for setting up logs only Use the List Current Configuration button in the Receiver Setup dialog see Figure 59 on Page 62 to bring you to the Rx Config from GPS screen shown in Figure 60 on Page 64 that will allow you to issue commands to the internal Euro4 GP
92. ogging Control window Figure 45 on Page 50 Filename Examples If it is 3 p m and you request CONTINUOUS in the Choose When section and 6 in the Choose Where section s Rollover field hh will be 12 and will roll over at 6 p m only 3 hours later when hh will be 18 The next rollover will be at midnight 6 hours later when hh will be 00 Here are some filename examples starting at 5 45 p m the First Letters of File Name were entered as range with a rollover of 6 hours range02011712 bin range02011718 bin range02011700 bin range02011806 bin range02011812 bin 1 The MPC internal time is Coordinated Universal Time UTC and may vary by several hours from your local time 2 If you have any difficulty with sending files for instance e mail or external ftp NovAtel Customer Service may request any GPSServer log or LoggerServer log files from your MPC s ftp site or root directory MPC User Manual Rev 0D Software Programs Chapter 6 6 1 1 2 Parsing Responses Click on the Parsing Responses button to go to the Command Response System Summary window as seen in Figure 47 Command Response summary from System 2002 03 0B 15 55 39 91 LogChannell 1 Closing Flirmpr rni20308100 ben 2 2002 03 08 15553891 HTP Thread 4 Selene d Beraes 1136 00 2 2000 03 08 15 55 39 91 PTE Tied 4 88 try Posh of d iprociti 1592g pzimi tz0 30900 bis 2 ar 20 23 00 160624 2002 03 08 122539 32 XEM Theid
93. on refers to how close an estimate is to the mean average estimate Accuracy versus Precision on Page 84 illustrates various relationships between these two parameters the true value is located at the intersection of the cross MPC User Manual Rev 0D 83 Appendix GPS Overview hairs the centre of the shaded area is the location of the mean estimate and the radius of the shaded area is a measure of the uncertainty contained in the estimate Figure 81 Accuracy versus Precision 9 High accuracy Low accuracy high precision high precision High accuracy Low accuracy low precision low precision B 3 1 Single Point vs Relative Positioning In single point positioning coordinates of a GPS receiver at an unknown location are sought with respect to the earth s reference frame by using the known positions of GPS satellites being tracked The position solution generated by the receiver is initially developed in earth centered coordinates which can subsequently be converted to any other coordinate system With as few as four GPS satellites in view the absolute position of the receiver in three dimensional space can be determined Only one receiver is needed With Selective Availability SA active the typical horizontal accuracy obtainable using single point positioning is of the order of 100 m 9596 of the time In relative positioning also known as differential positioning the coordinates of a GPS receiver at an unknown po
94. on to the internet If there is a status message the IP address will also appear on the next row ESTATUS The IP address of the ethernet connection The ENET and ESTATUS rows are updated every 60 seconds unless a row is being edited The 60 second refresh will continue once the editing has stopped MPC User Manual Rev 0D VFD Menus Chapter 5 MODEM CONNECT YES or NO depending on whether there is or is not respectively a connection via the modem card MSTATUS The IP address of the modem connection or a status message DIRECT CONNECT YES or NO depending on whether there is or is not respectively a connection via the serial port DSTATUS The IP address of the direct connection or a status message The MSTATUS and DSTATUS rows are refreshed when the Remote Access Service RAS calls back MPC SHUTDOWN TYPE EXECUTE Choose either or POWERDOWN in the TYPE data display Press the lt 5 gt key to do neither and return to the last menu Choosing REBOOT will cause the MPC to reboot Choosing POWERDOWN will power down the internal embedded PC The keypad will be unusable again until the power switch is turned off then on and the VFD is visible again The MPC is designed for continuous operation However if you need to power down the unit it is recommended that you always use the MPC Shutdown Type menu see above Then give the internal operating system a few minutes to flush its c
95. ower source the MPC will be ready to go The MPC incorporates a Vacuum Fluorescent Display VFD on its front panel and this manual will take you through its menus and features see VFD Menus on Page 40 A VFD Menus Quick Look weatherproof guide is also provided to help you find the VFD windows you need in a hurry using the navigation buttons on the MPC The Euro4 in the MPC utilizes a comprehensive user interface command structure which requires communications through its communications COM ports A supplementary manual is included to aid you in using the commands and logs available in the OEM4 family of receivers It is recommended that these documents be kept together for easy reference A graphical user interface is provided for your MPC via the internet see Section 6 1 Modulated Precision Clock Website on Page 49 Prerequisites A standard internet browser e g Netscape or Microsoft Internet Explorer is required on a PC work station to access the Modulated Precision Clock website MPC User Manual Rev 0D 12 1 Introduction The MPC is a high performance high accuracy GPS receiver with fast data update rates and integrated memory in its hard disk for data logging The MPC s front panel also features a Vacuum Fluorescent Display VFD panel and keypad for on the fly configurations Depending on which model you purchase the MPC is capable of receiving and tracking the L1 C A code L1 and L2 carrier phase and
96. ower switch MPC User Manual Rev 0D 17 Chapter 3 MPC Setup Considerations 3 1 Choose the Right Antenna The recommended antenna is from the GPS 600 antenna series which are ideal for all applications A Model 600 GPSAntenna provides comparable performance to a choke ring ground plane antenna while being much lighter and smaller When installing the antenna system choose an antenna location that has a clear view of the sky so that each satellite above the horizon can be tracked without obstruction e mount the antenna on a secure stable structure capable of safe operation in the specific environment The purpose of the GPS antenna is to convert the electromagnetic waves transmitted by the GPS satellites into RF signals An active GPS antenna is required for the MPC to function properly there is a provision to enable or disable the DC power to the active GPS antenna in case you wish to use an antenna that has an alternate power source Please refer to the ANTENNAPOWER command in Volume 2 of the OEM4 Users Guide for details on the command to do this See List Current Configuration on Page 63 for information on how to issue commands via the Modulated Precision Clock website An active antenna is required because its low noise amplifier LNA boosts the power of the incoming signal to compensate for the line loss between the antenna and the Euro4 GPSCard If the limit of 14 dB of allowable cable loss is exceeded excessive signal
97. pplicable and click on the GO button to delete them or click on the Home button to return to the main Setup Configuration page and abandon deletion 6 1 2 4 Network Setup In the Setup Configuration window click on the Network Setup button The Select Port to Configure window appears as seen in Figure 55 on Page 59 Select Port to configure SailpPrr Set Modem Set Up Emhemetr Hone Figure 55 Network Setup From this page you can choose the Set Up button for your internet connection The choices are PPP Modem and Ethernet MPC User Manual Rev 0D 59 6 Software Programs CONFIGURE PPP PORT An example of the Configure PPP Port window is shown in Figure 56 Configure Client parameters for the PPP Port User Hanit ec Passwerd Eedial attempts Time Between attempts 1 minuta 19 before hangrg op f Obtain an IP automatically Ser IP 0 000 Figure 56 Configure PPP Port First enter the user name and password the will use to connect to the PPP host in the User Name and Password fields Then enter the number of redial attempts you would like the MPC to make and choose a length of time between these attempts Choose how long or never to wait while the connection is idle before the MPC should hang up Select to enter the IP address for the direct connection in the Set IP field or select Obtain an IP Automatically for the IP address
98. ption or similar disruptive event during a data recording session allow for your data to be possibly reduced by several kilobytes To the extent possible error messages refer to the RXSTATUS log in Volume 2 of the OEM4 Users Guide and the GPS attempt to describe the problem As is described on Page 31 the GPS row in the MPC System Status screen of the VFD menus also provides status information The MPC is designed for continuous operation However if you need to power down the unit it is recommended that you always use the MPC Shutdown Type menu see Page 45 Then give the internal operating system a few minutes to flush its cache buffers to the hard drive and turn off the power at the power switch MPC User Manual Rev 0D 39 Chapter 5 VFD Menus The front panel of MPC has a Vacuum Fluorescent Display VFD with 7 interaction keys The panel consist of four navigational a combination edit enter a power and an escape key The main functions of the VFD menu are MPC Status MPC Connect Configure Client Configure Ethernet Configure Modem Configure Direct PPP Accompanying this manual is a water tear proof VFD Menus Quick Look Guide for on the fly referencing of menu locations The current menu page being displayed is shown in the top left corner of the VFD screen Figure 33 shows the layout of the VFD area Functionality Navigation Aids 4 Row Labels Main Data Display Row Cur
99. r what country the power source comes from the MPC will automatically recognise and accept the voltage Figure 2 Typical MPC Setup Reference Description Reference Description 1 MPC 8 Modem RJ11 Ethernet RJ45 2 Power source or PPP RS232 connector 3 MPC power cable 9 GPS antenna 4 Input Power connector 10 GPS antenna cable 5 Close up of on off o switch 11 GPS Antenna In connector 6 Internet provider 12 User supplied PC to view the 7 User supplied RJ45 cable Modulated Precision Clock website to Ethernet or RJ11cable to on the internet Modem or RS232 cable to PPP connector MPC User Manual Rev 0D 16 Quick Start Chapter 2 A typical configuration would result from the following steps see also Figure 2 on Page 16 Place the MPC on a desk or other suitable work surface Connect the output of a power source to the Power Input port on the back of the MPC Connect a GPS antenna to the GPS Antenna In connector on the back of the MPC Connect appropriate cable from the back of the PPP Ethernet or Modem port to your intended internet or intranet connection source nd Press the power button Configure your intended internet connection using the VFD menus The MPC supports many options for internet connectivity please see Section 4 2 Configuring the Network starting on Page 25 for details 7 Monitor the MPC status using the VFD menus 8 Obtain the MPC IP address given by your internet provi
100. rams 6 1 4 Download Data In the Logging Control window click on the Download Data button The Download Files window appears as seen in Figure 73 Download Files Choose GPSWeek GO FTF pues Figure 73 Download Data You are shown a choice of GPS week buttons You can first use the GPS Calendar button to check which GPS week you are interested in The GPS Calendar window can be seen in Figure 74 on Page 72 GeBsek 3 January 2002 GPZWedk bon date HET vag mud 3u 52304 Figure 74 GPS Calendar 72 MPC User Manual Rev 0D Software Programs Chapter 6 Each GPS week is shown in the far left of the screen There are also three rows for each GPS week that show date The regular calendar dates for the week ydate Each corresponding number of days into the year for each day of the week mjd The Modified Julian Day MJF is defined as the Julian Day minus 2400000 5 For any date in the 208 and 215 centuries the will be at most five decimal digits long The Julian Period an interval of 7980 years began at 12 noon January 1 4713 BC and will end at 12 noon January 1 3268 AD You can go back or forward through the calendar months by using the Go Back and Go Forward buttons Alternatively you can select a calendar month and year from their respective drop down boxes and then click on the Go button The Home button
101. rol station where the ephemerides are re computed The resulting ephemerides corrections and timing corrections are transmitted back to the satellites via the data up loading stations B 1 3 The User Segment The user segment such as the NovAtel GPSCard receiver consists of equipment which tracks and receives the satellite signals The user equipment must be capable of simultaneously processing the signals from a minimum of four satellites to obtain accurate position velocity and timing measurements B 2 Height Relationships 82 What is a geoid An equipotential surface is any surface where gravity is constant This surface best represents mean sea level and not only covers the water but is projected throughout the continents In North America this surface is most commonly used at its zero value i e all heights are referenced to this surface What is an ellipsoid An ellipsoid also known as a spheroid is a mathematical surface which is sometimes used to represent the earth Whenever you see latitudes and longitudes describing the location this coordinate is being referenced to a specific ellipsoid GPS positions are referred to an ellipsoid known as WGS84 World Geodetic System of 1984 What is the relationship between a geoid and an ellipsoid The relationship between a geoid and an ellipsoid is shown in Illustration of GPSCard Height Measurements on Page 83 MPC User Manual Rev 0D GPS Overview Appendix B Figure 80
102. rrow that does not appear signifies that there is no menu in that direction Pressing the lt ESC gt key continually will take you back through menu items until you return to the top of the menu where you started There are two mechanisms for editing data Edit by Digit and Edit by Group 5 1 1 Edit Digit Display Press the ENTER key to cause the indicator to appear on the row you wish to edit and a cursor to appear under the first digit of that row Cursor horizontally to the digit to be changed then cursor up to increase its value or down to decrease its value A numeric values ranges from 0 to 9 and an alpha character can be A to Z Press the ENTER key again to save the new value Alpha numeric fields can be shortened by toggling the characters to spaces When the screen is refreshed the spaces will disappear and leave you with a shortened entry Address fields such as IP addresses may have truncated values in the memory for example 195 45 61 1 but will appear padded with zeroes for example 195 045 061 001 in the menu The VFD menus only provide upper case letters An example of a screen in edit digit display mode is shown in Figure 35 CONFIG CLIENT e 9 3 ABCDEFG 4 TUVWXYZ PRIV NO CONTROL NO ACCESS NO VIEW NO INFO NO Figure 35 Edit Digit Mode 5 1 2 Edit Group Display Press the ENTER key to cause the 4 indicator to appear on the row you wish to edit and the first M
103. s An OEM4 response summary in the form Res YYYY MM DD hh mm ss ss gt response where YYYY MM DD hh mm ss ss are as they are Cmd above response is a message or a response to a log command Notice in Figure 47 on Page 53 that an RXHWLEVELS log was mis spelled in the Logging Control window and is highlighted here The re sponse in the form of an error message is also highlighted in Figure 47 Is a parsing response such as an MPC system response in the form Prs start gt stop c action where Start time is the time in GMT that the parse response started in the form YYYY MM DD hh mm ss ss as described Cmd above stop time is the time in GMT that the parse response ended in the form YYYY MM DD hh mm ss ss as described in Cmd above c is the channel number action is an MPC file or system action The Home button will return you to the Modulated Precision Clock home page Figure 43 on Page 49 54 MPC User Manual Rev 0D Software Programs Chapter 6 6 1 1 3 Logging Stats In the Logging Control window click on the Logging Stats button to bring you to the Logging Statistics page An example is shown in Figure 48 Select Channel to View ma Chera 2 Channel 3 Chensel 4 Channel E Logging Command for Channel 1 Lae 1 Lane Lauak 104 14 3 RANGE Pange kg Lav 2B RAWEPHENM Boe Bphemens In orranon Lae 2 OR OEMA C
104. s factory configured for operation with any of the dual frequency factory configured GPSAntenna models in which case no special wiring is required The internal antenna power source of the Euro4 can produce 4 25 to 5 25 V DC at up to 90 mA MPC User Manual Rev 0D 18 Setup Considerations Chapter 3 CAUTION No warranty is made that the MPC will meet its performance specifications if a non NovAtel antenna is used 3 2 Rear Panel Functionality The connections on the rear panel and their connector types are shown on Figure 3 Figure 3 Close up of Connectors on Rear Panel x PRECISION E P N 7296 Made in CANADA HN Each connector is keyed to ensure that the cable can be inserted in only one way to prevent damage to both the MPC and the cables Furthermore the connectors that are used to mate the cables to the MPC require careful insertion and removal Observe the following when handling the cables To insert a cable make certain you are using the appropriate cable for the port the serial cable has a different connector DB9 than the GPS Antenna TNC or the Modem or the Ethernet RJ45 connectors A WARNING DO NOT PULL DIRECTLY ON THE CABLES MPC User Manual Rev 0D 19 Chapter 3 MPC Setup Considerations 3 2 1 10 MHz In and 10 MHz Out There are two BNC connectors on the back of the MPC for 10 MHz In and 10 MHz Out These two connectors are looped using an RF
105. sor Figure 33 VFD Areas The VFD areas are defined as Functionality The title of the current menu page Main Data Display Current data and depends on the active Functionality Row Labels Row labels for the data being displayed in the Main Data Display Row Cursor This cursor indicates the current row It is especially useful for choosing a row to edit Navigation Aids Four directional arrows show you how you can proceed through the menu items for the current Functionality e 4 This edit cursor appears when the digits or a group in a row become editable See also Edit Digit Display and Edit Group Display on Page 41 When the MPC is first powered up and after an initialization period the NovAtel logo appears followed by the MPC SYSTEM STATUS menu see Figure 34 on Page 41 and also Page 42 from MPC User Manual Rev 0D 40 VFD Menus Chapter 5 5 1 where you can access any of the main functionality menus and their columns MPC SYSTEM STATUS TIME 12 33 24 GMT GPS DATE 1143 W 493408 5 GPS GPS SYSTEM OK EXT OSC LOCKED LOGGING NOT ACTIVE SPACE 935840 KB COMPUTER TEST 9 Figure 34 Opening Menu Menu Access The menu structure is arranged as columns of functionality Each column may have several pages of related data where a page can have up to seven rows Simple menu access is achieved by following the directional arrows in the top right of the VFD when they appear J 5 An a
106. tch RJ11 21 MPC User Manual Rev 0D patch RJ45 21 power 80 warranty 9 calendar 72 carrier phase 86 carrying handle 14 cautions 11 19 client configure 36 45 47 48 connect 26 36 clock bias 84 93 data 82 external 20 offset 88 synchronization 87 CMR 63 coaxial cable 18 23 97 COM ports 79 commands enter 55 OEM4 Users Guide 97 position averaging 89 pre configuring 39 summary 52 54 communications cable 20 configuration 14 17 base 55 63 differential 91 factory 18 internet 17 46 48 55 59 connectors 16 19 20 25 77 constellation 70 81 conversion 83 copyright 2 current amp 11 customer service 10 D data link 85 rates 76 98 23 77 dealer 10 DGPS 20 38 differential corrections 89 91 92 14 positioning 84 86 87 91 dilution of precision DOP 86 88 distance 93 download data 72 74 E elevation 93 e mail 10 ENTER key 23 41 43 44 ephemeris errors 87 91 overview 82 errors 39 ephemeris 87 in single point positioning 84 ESC key 23 41 43 44 Ethernet 21 25 26 extended cable lengths 18 external clock 20 F factory 18 features 14 filename 51 firmware 10 14 75 fix position 63 fixed ambiguities 93 frequency 93 front end cap 23 fuse 22 G GEO WAAS 95 GPS antenna 9 977 Antenna In 23 calendar 72 73 overview 81 88 90 94 time 87 MPC User Manual Rev 0D Index
107. tial Corrections Modem Input Differential Correction GPS Receiver 2 Reference Station Remote Station MPC User Manual Rev 0D 91 Appendix GPS Overview B 5 2 1 Reference Station The nucleus of the differential network is the reference station To function as a reference station the GPS receiver antenna must be positioned at a control point whose position is precisely known in the GPS reference frame Typically the fixed position will be that of a geodetic marker or a pre surveyed point of known accuracy The reference receiver must then be initialized to fix its position to agree with the latitude longitude and height of the phase centre of the reference station GPS receiver antenna Of course the antenna offset position from the marker must be accurately accounted for Because the reference station s position is fixed at a known location it can now compute the range of its known position to the satellite The reference station now has two range measurements with which to work computed pseudoranges based on its known position relative to the satellite and measured pseudoranges which assumes the receiver position is unknown Now the reference station s measured pseudorange unknown position is differenced against the computed range based on known position to derive the differential correction which represents the difference between known and unknown solutions for the same antenna This difference between t
108. to be assigned automatically Click on the OK button to save your changes or click on the Home button to cancel the settings return you to the Modulated Precision Clock home page Some of these parameters can also be adjusted via the VFD panel on the MPC 60 MPC User Manual Rev 0D Software Programs Chapter 6 CONFIGURE MODEM PORT An example of the Configure Modem Port window is shown in Figure 57 Configure Client parameters for the Modem Port Ther Password 12MPC34 Phone Number 2954500 Endal attempts Tore Between attempt Tdle time before hanging up btn an IF autocnatic ally C Set IF 2000 Figure 57 Configure Modem Port First enter the user name and password the MPC will use to connect to the PPP host in the User Name and Password fields Then enter the phone number that the modem is to call out on to make a connection with the host or internet service provider Enter the number of redial attempts you would like the modem to make and choose a length of time between these attempts Choose how long or never to wait while the connection is idle before the modem should hang up Select to enter the IP address for the modem connection in the Set IP field or select Obtain an IP Automatically for the IP address to be assigned automatically Click on the OK button to save your changes or click on the Home button to cancel the settings return you to the
109. tup window and the Set Up Users window will appear as seen in Figure 62 on Page 65 Select Option Agdminstrator Salegi serio Edit Add Hew Lear Figure 62 Set Up Users Once you have selected a user from the list you can either edit that user or add a new user These are described in this section MPC User Manual Rev 0D 65 Chapter 6 Software Programs SELECT USER TO EDIT Click on the Edit button in the Set Up Users window and the Edit User window will appear as seen in Figure 63 Select Option Edi the Prillegeg o Achyceustrater E View Status Download Data F Control Loggng F Adminstrator E Phocein Adjust Leer Prvilages Figure 63 Edit User Check in the privileges check boxes that apply to the current user The choices are View Status The user can view the status pages on the website Download Data The user can download data from the MPC using the website e Control Logging user can use the Logging windows and control logging Phonein The user can phone in to the MPC via the modem connection Click on the Adjust User Privileges button for the options to take effect Click on the Enter New Password button to change the password for the user To delete a user click on the Delete This User button When you are done click on the Home button to return you to the main Set Up Users page ADD NEW USER Click on the Add New User button in the Set Up Users window and the New User window will appear
110. vely access to the MPC s File Transfer Protocol FTP service STATUS 5 or depending on whether this user has or has not respectively the right to view the MPC SYSTEM STATUS pages via the Modulated Precision Clock website see Chapter 6 starting on Page 49 See also Status on Page 42 SUBMIT Toggling to YES and then pushing the Enter key submits the username password and privileges to the appropriated configuration files on the web server 5 2 4 Configure Ethernet The CONFIG ETHERNET menu allows you to configure the ethernet or internet connection with the Figure 39 shows the CONFIG ETHERNET menu CONFIG ETHERNET SOURCE AUTO IP NO IP ADDR 000 000 000 000 SUBNET 000 000 000 000 GATEWAY 000 000 000 000 COMPUTER 5 4 Figure 40 Config Ethernet Menu CONFIG ETHERNET e SOURCE YES depending on whether or not respectively the IP address is assigned automatically via a Dynamic Host Configuration Protocol DHCP server on the local network intranet If AUTO IP is changed to YES then the SUBNET and GATEWAY rows will be assigned automatically upon activation and anything in the IP ADDR row will be deleted ADDR The internet protocol IP address SUBNET The address of the system of interconnections within the communications system that allows the components to communicate 46 MPC User Manual Rev 0D VFD Menus Chapter 5 directly w
111. will return you to the Modulated Precision Clock home page Figure 43 on Page 49 so if you have decided on a GPS week number click on your internet browser s back button to return you to the Download Files window Figure 73 on Page 72 From here you can now click on the GPS week button of your choice The Choose File to Download window appears as seen in Figure 75 Choose File to Download GPS Week 1145 121915 bis 1219 1B L2 1920 bin anced 199014 bi 122015 ban Bang 122012 bin Bowel 122020 ten 01 1 202 bin 2122112 bin Eat 122120 ten 122122 ben Figure 75 Choose File to Download Click on the link for the file you wish to download Click on the GO FTP link see Figure 73 on Page 72 to go to the FTP address you specified in the Logging Setup window s Send File s to Remote FTP field See also Section 6 1 1 1 Logging Setup on Page 51 Click on the OK button return to the Modulated Precision Clock home page No downloading will take place For a description of the format of the filenames see the Set Up Logging section on Page 51 Choose a filename and click on its link A standard Windows download screen appears as seen in Figure 76 on Page 74 MPC User Manual Rev 0D 73 Chapter 6 Software Programs T Tm Figure 76 Typical File Download Window To save the file to disk choose the Save This File to Disk field Click on the OK button and a Save As
112. y types of positioning such as ocean going vessels general aviation and recreational vessels that do not require position accuracies of better than 40 meters CEP However increasingly more and more applications desire and require a much higher degree of accuracy and position confidence than is possible with single point pseudorange positioning This is where differential GPS DGPS plays a dominant role in higher accuracy real time positioning systems 88 MPC User Manual Rev 0D GPS Overview Appendix B 5 1 2 Single Point Averaging with the GPSCard By averaging many GPS measurement epochs over several hours it is possible to achieve a more accurate absolute position This section attempts to explain how the position averaging function operates and to provide an indication of the level of accuracy that can be expected versus total averaging time The POSAVE command implements position averaging for reference stations Position averaging will continue for a specified number of hours or until the averaged position is within specified accuracy limits Averaging will stop when the time limit or the horizontal standard deviation limit or the vertical standard deviation limit is achieved When averaging is complete the FIX POSITION command will automatically be invoked If the maximum time is set to 1 hour or larger positions will be averaged every 10 minutes and the standard deviations reported in the AVEPOS log should be correct If the maxi
113. you will be advised of proper shipping procedures to return any defective product When returning any product to NovAtel please return the defective product in the original packaging to avoid ESD and shipping damage MPC User Manual Rev 0D 9 Customer Service EURO4 FIRMWARE UPDATES AND UPGRADES Firmware updates are firmware revisions to an existing model which improves basic functionality of the GPS receiver During the one year warranty coverage following initial purchase firmware updates are supplied free of charge After the warranty has expired firmware updates and updated manuals may be subject to a nominal charge Firmware upgrades are firmware releases which increase basic functionality of the receiver from one model to a higher level model type When available upgrades may be purchased at a price which is the difference between the two model types on the current NovAtel GPS Price List plus a nominal service charge Please see Section 6 2 MPC Firmware Upgrades amp Updates on page 75 for a description on how your MPC is upgraded updated via the web CONTACT INFORMATION Firmware updates and upgrades are accomplished through NovAtel authorized dealers Contact your local NovAtel dealer first for more information To locate a dealer in your area or if the problem is not resolved contact NovAtel Inc directly using one of the following methods Call the NovAtel GPS Hotline at 1 800 NOVATEL North America or 403 295 4900
114. ysis Plot Type 67 Choose Value to Plot Against Time 2 68 Tire Plotiexamlple dece oth 69 Time Plot Gy ete e ede ete e ede Pot 69 Choose Bere 69 Gornstellation Sky Plot io eer be REOR eds 70 L1 Carrier to Noise Vs Elevation 71 L2 Code Minus Carrier Vs Elevation 71 Download Data RR KR 72 GPS Calendar ener tet onda 72 Choose File to 73 Typical File Download Window 74 SAV OAS RE 74 Power Cable mor otn debit t ov rep e Regen rr EE 80 NAVSTAR Satellite Orbit Arrangement 2 81 Illustration of GPSCard Height Measurements 83 Accuracy versus Precision 4 4 44000 84 Example of Differential Positioning 85 Single Point Averaging nennen nen 90 Typical Differential Configuration 22 0 24 000000 91 The WAAS Conceptione ens 96 User Manual Rev Tables 1 Controller Models enne 14 2 UDP Message 52 3 COM Port 79 4 Latency Induced Extrapolation 8

MPC OM-20000072 User's Manual

Contents

Download Pdf Manuals

Related Search

Related Contents