A3 GNSS Receiver User Manual - Measurement Systems Limited
Contents
1. 0000000000000 10 6 3 Ways of Outdoors Working for Static Surveyling 11 0A GPS S y ecaa EEEE EEEE 12 6 4 1 Network Designing sss sees eee eee eee eee 12 6 4 2 Accuracy Standard in Static Surveyling 13 6 4 3 GPS Network 13 6 4 4 Shapes of GPS Network sese 14 6 4 5 Principles of GPS Network Designing 16 TaFactory SSUM Saas aia cso oh 18 8 Optional Accessories cccccceeessesssseseeeeeeeeeeeeeeeeesseessseeesseesesaaas 19 A3 User manual S PEC TT 20 9 1 Physical Specifications ororoononoonoovonoooooooennnnn 20 9 2 Positioning ACCULACY sese 20 9 3 Technical Specifications cccccccccccccccccceeeeeeceeeeeeeeseeeeseeeeees 20 A3 User manual 1 5ummary A3 is regarded as a highly integrated semi open structure and modular designed Static surveying system independently researched by FOIF GNSS antenna mainboard Li ion battery memory device etc are all focused in one receiver Moreover GNSS antenna and battery are independently modules which are easy to replace thus which is convenient in the products maintainance and upgrade With high accuracy fast tracking function of inner GNSS mainboard A3 can track the satellite signals quickly and simultaneously Highly sealed waterproof dustproof shockproof low power consumption are its basic inspecting rules With super bright and weatherable OLED screen built on A32. FOIF A3 GNSS Receiver User Manual Versionl1 0 Suzhou FOIF Co Ltd A3 User manual Introduction Congratulations You have just acquired the latest static receiver A3 GNSS Surveying System from FOIF GNSS has revolutionized control surveys topographic data collection and construction surveying Purchasing the right tools for a professional job is essential in today s competitive business environment Learning to put these tools to work quickly and efficiently will be the focus of the present manual In addition because it s easy to use you will be able to focus on your job and forget almost everything about the technical aspects of your equipment No more cables no more clip on modules A3 will be the reliable tool you are expecting for all your GNSS survey operations A3 User manual Safety Information This manual describes the A3 GNSS Receiver Before you use your receiver make sure that you have read and understood this manual as well as all safety requirements Nw ARNING Ignoring this indication and making an operation error could possibly result in death or serious injury to the operator f CAUTION Ignoring this indication and making an operation error could possibly result in personal injury or property damage Rechargeable Lithium ion batteries This receiver uses a rechargeable Lithium ion battery A WARNING Do not damage the rechargeable Lithium ion battery A damaged battery can cause an explosi
3. receiver the real time information of the receiver can be shown on the screen 4 lights and 4 buttons are easily used to set the receiver and the sound reminder is helpful to the outdoors surveying Downloading and storing of the static data could be convenient because of the inner MicroSD card thus resolves your trouble causing by the insufficient memory Due to its advanced compatibility static surveying with GNSS products of other companies is no problem Attribute to its semi open structure the components can easily be upgraded in order to be compatible with GNSS products of other companies in the surveying field The electric power design for A3 is also very advanced large capacity of Li Ion batteries S800mAh made by FOIF These batteries are depended on both external and internal charging ways A3 can also be used by external DC power 7 18V A3 is widely used for control survey engineering survey topographic survey GIS boundries location area survey deformation monitoring etc And from the education subjects based on GNSS products you can also find A3 A3 User manual 2 Overview The receiver incorporates a GPS antenna receiver and battery in a light weight unit 2 1 Use and Care e Make sure always carry the product in its transport container and secure it e Operating or storing the receiver outside the specified temperature range can damage it For more information refer to 9 Specifications eOnly use a clea
4. apes of GPS network can be divided into several types Radial network Point connecting network Side connecting network Polygon connecting network and Mixed 14 connecting network Radial network A A al j i c d 1 v i k N d U N N 177 N Y l w a 1 i X U a 1 A J a h V i fi pe J 7 lm Fi U we a Rada M Point connecting graph Side connecting graph A3 User manual Radial network is a simple geomatic figure but it is very difficult to check the accuracy because all the sides of that network are not closed The advantages for this type is only need 2 receivers which fast tracking way It is widely used in low is regarded as an easy working precision engineering surveying cadastra survey mapping and so on Point connecting network is defined as a figure connecting two adjacent shapes by only one common point The advantages for this type is high efficiency fast extending but it also can not confirm the high precision surveying So it is not suggested in precise working On the left is 3 receivers working simultaneously in the Point connecting network Side connecting network is defined as a figure by their common side It is as same as normal GPS connecting two adjacent shapes network designing shown in the last paragraph and is widely used in the surveying field because of its high precision 15 A3 User manual Polygon connecting network is de
5. damaged or leaking Charge the Lithium ion battery only in FOIF product that is specified to charge it Be sure to follow all instructions that are provided with the battery charger Discontinue charging a battery that gives off extreme heat or a burning odor Use the battery only in FOIF equipment that 1s specified to use 1t Use the battery only for its intended use and according to the instructions in the product documentation A3 User manual Other Warnings WARNING Operating or storing the receiver outside the A specified temperature range can damage 1t For more information refer to 9 Specifications A3 User manual Content S Ta a EAE T EEEO l PED e a A E E EE A E E E E AE E E 2 2A Me SS Te e 2 3 Unpacking the Container esse 3 4 Setting Up the RECEIVE ssssienestisntan ta e a 4 Med et T ea E E E E E E 4 4 2 Measuring the Antenna Heights 5 4 2 1 Description sss sese R 5 4 2 2 Measuring the Antenna Heights for a Tripod Setup 5 5 General Operation essea 6 Dod Front Pane herenera aa 6 5 2 Button Functions sss s sss T 6 5 3 The LED Behavior a gh cccssessesisacdenndsecscecdseetenctssesosecsaes 7 5 4 The Batteries and PO E 7 5 4 1 Battery Charging and Storage cccccccccccccccceseeeeeeeees I 5 4 2 Charging the Lithium ion Battery sss sese 8 5 4 3 Disposing of the Rechargeable Lithium ion Battery 8 Ton Qi MTT 9 O O T 9 6 2 Data Downloading and Format Converting
6. erformance and extend the life of your batteries Fully charge all new batteries prior to use Keep all batteries on continuous charge when not in use Batteries may be kept on charge indefinitely without damage to the receiver or batteries Do not store batteries in the receiver or external charger unless power 1s applied If you must store the batteries fully charge them before storing and then recharge them at least every three months 5 4 3 Disposing of the Rechargeable Lithium ion Battery Discharge the Lithium ion battery before disposing of it When disposing of the battery be sure to do so in an environmentally sensitive manner Adhere to any local and national regulations concerning battery disposal or recycling A3 User manual 6 Static Surveying 6 1 Process 1 Fix A3 on tripod 2 Measure the height of A3 3 Turn on A3 while more than 4 satellites are tracked by this instrument then start the static surveying from the buttons of A3 screen Detailed ways are a Turn on A3 Set menu 4 04 06AUTO C 7 15 H 3 887 V 34 476 Set b Press Up or Down button to choose GNS5 8tatic Then static collection 1s starting Number of satellites State of A3 COM Fadi 4 eal ic A Static is starting ilay 371 Power indicator Number of records Current accuracy 3 8 94 7 6 Set 4 It is necessary to record the surveying time SN of A3 height of A3 etc on a
7. ers 4 A3 User manual f Fluorescent lights g Switching power supplies Avoid exposure to extreme environmental conditions including a Water b Heat than 65 C c Cold less than 30 C d Corrosive fluids and gases 4 2 Measuring the Antenna Heights 4 2 1 Description The height of A3 receiver above the point consists of three components The vertical height reading The vertical offset The vertical phase centre variations For most operations pre configured standard settings in controller can be used 4 2 2 Measuring the Antenna Heights for a Tripod Setup L1 80 5 L2 84 5 R 97 h 56 Ways Use your tapeline from the buckle to the ground point where your base is setting up thus the reading on tapeline is the height of A3 A3 User manual 5 1 Front Panel General Operation lower cover shockproof rubber ring di splayed operating panel 5 2 Button Functions The receiver has six buttons Power Hot Button ESC ENT Up and Down PWR ESC Up Down ENT OLED PWR Power button k A o o Power button Press until A3 screen displayed TO Three LEDs lit together Turn off the receiver Press until seeing Release Key shown on screen For more information about static collection please refer to 6 Static Surveying A3 User manual 5 3 The LED Behavior The LEDs on the front panel of the receiver indicate various operating states The following table de
8. fined as a figure connecting the two adjacent shapes by at least 3 common points So this network at least needs 4 receivers It is better than side connecting network in accuracy but not working A connecting era li time So it is only suggested for high precision control surveying Mixed connecting Because every type of network has its own disadvantage so we can use Mixed connecting network which can combine the advantages of these types to achieve higher efficiency working but lower investment both in time and money Mixed connecting network is also the common type in doing the surveying job 6 4 5 Principles of GPS Network Designing Principles for GPS network designing include 3 parts point position reliability and accuracy Point position 1 Widely place is suggested because of good satellites signals big buildings are not allowed at the range of 10 15 in elevation mask 2 Keep 200m away from high power WiF1 object e g radio powerline etc 3 It 1s better to be removed from the large water area high building etc to avoid or reduce the effects of multipath 4 The place for point position should be easy going and also steady for further applications A3 User manual Reliability 1 Longer surveying time 2 Repeated station setting is suggested 3 Comfirm that one point should be involved at least 3 baselines 4 The sides for every part of the network should not exceed 6 Precision 1 Synchronous surveying 1s sugges
9. ing Accuracy standard in static surveying is judged by the rms of distance in the adjacent two points o Ja bsd g rms mm a fix d error mm b scale factor ppm dl distance km The surveying accuracy for GPS is divided into 6 levels by Surveying Standard for GPS published in 2001 AA A B C D E AA A B are for country s GPS control surveying Level C is mainly in engineering surveying of big or middle cities D and E are for control surveying in middle or small cities Items AA A NB C D E Fixed error a mm 3 s st 10 10 10 Scale factor b ppm 0 Ot Se 1 lt 5 10 90 Minimum distance for ao nn na ni adjacent two points km 7 LUQ ai ja Maximum distance for adjacent two points km 8000 MU 210 S lt U 5 Average distance for adjacent two points km 6 4 3 GPS Network L 000 300 TO 10 15 3 10 0 2 5 There are many kinds of GPS network designing such as tracking alternately observation multi base single base normal Tracking Several receivers fixing at the certain points for a long time observation such as 1 year without stop which is suitable for level AA control survey or permanent monitoring network Alternately observation Several receivers fixing at the points of certain district they also need long time surveying several days after this procedure change the receivers to the other 13 A3 User manual points of this district then use the same su
10. n soft lint free cloth for cleaning If necessary moisten the cloth with water or pure alcohol Do not use other liquids e Dry the product the transport container the foam inserts and the accessories at a temperature not greater than 40C 108T and clean them Do not repack until everything is completely dry A3 User manual 3 Unpacking the Container 4 4 OS O oto OTO Li Ion battery 5800mAh FDQ7D 02 FDQ7D 01 E Charger Detailed information can check from A3 equipment list A3 User manual 4 Setting Up the Receiver 4 1 Set Up 1 Set up the tripod mount and level the tribrach onto the tripod 2 Check that the tribrach is correctly centred over the marker 3 Place and lock the receiver on the tribrach 4 Check that the tribrach is still correctly positioned and leveled Notice When plugging in a cable with LEMO plug make sure that the red dots on the receiver port and the cable connector line up Do not use force to plug cables in as this may damage the connector pins When disconnecting a cable with LEMO plug grasp the cable by the sliding collar or lanyard and then pull the cable connector straight out of the port Do not twist the connector or pull on the cable itself Avoid the following sources of electrical and magnetic noise a Gasoline engines Spark plugs b Televisions and PC monitors c Alternators and generators d Electric motors e Equipment with DC to AC convert
11. notebook while this receiver is doing the static surveying 5 When outdoors surveying is over turn off A3 Notice The data recorded on Flash can be copied via USB cable 9 A3 User manual 6 2 Data Downloading and Format Converting 1 Connecting A3 and PC for data downloading 2 File name given should according to the notes of outdoors surveying conditions made by yourself for your easy distinction it is recommended to indicate the file name from SN of A3 surveying time and point name For example A3 the detailed information 1s A30000086 SN of receiver for the first time surveying at 9am to 10am on CPI0023 point name so we can give its name as 0023086A Further more still this receiver for the second time surveying at 11am to 12am on point CPI0027 So then we can give its name as 0027086B which 1s different from 0023086A although we use the same receiver to do the job The front 4 numbers are point name the later numbers are SN of receiver the last capital letter 1s surveying order 3 Convert these data to RINEX format and input the height of A20 You can finish this by the software FOIFGNSS shown below C V i A 4 Click Import raw files for translated to RINEX choose the files that need to be converted These files are downloaded from receivers This software can convert as much as 16 files at the same time 5 Choose the files that you want to convert then click Open The converted file
12. nt 9 2 Positioning Accuracy Specification Post process 9 3 Technical Specifications 12 channels 2SBAS 20 A3 User manual FOIF SUZHOU FOIF CO LTD ADD 18 Tong Yuan Road Suzhou 215006 P R China TEL 86 512 65224904 FAX 86 512 65220619 http www foif com E mail internationalsales foif com cn
13. on or fire and can result in personal injury and or property damage To prevent injury or damage Do not use or charge the battery if 1t appears to be damaged Signs of damage include but are not limited to discoloration warping and leaking battery fluid Do not expose the battery to fire high temperature or direct sunlight Do not immerse the battery in water Do not use or store the battery inside a vehicle during hot weather Do not drop or puncture the battery Do not open the battery or short circuit its contacts N A3 User manual WARNING Avoid contacting with the rechargeable Lithium ion battery if 1t 1s appeared to be leaking Battery fluid 1s corrosive and contacting with it can result in personal injury and or property damage To prevent injury or damage If the battery leaks avoid contacting with the battery fluid If battery fluid gets into your eyes immediately rinse your eyes with clean water and seek medical attention Do not rub your eyes If battery fluid gets onto your skin or clothing immediately use clean water to wash off the battery fluid WARNING Charge and use the rechargeable Lithium ion battery only in strict accordance with the instructions Charging or using the battery in unauthorized equipment can cause an explosion or fire and can result in personal injury and or equipment damage To prevent injury or damage Do not charge or use the battery of 1t appears to be
14. rveying way This mean can eliminate the influence of SA It is suitable for the GPS network of level A and B survey Multi base While several receivers are fixing at the base points like CORS with long time surveying then we can use other rovers working in this net simultaneously It is suitable for level C and D survey Single base Use one receiver fixing at the base point working continuously then use rovers to do the surveying job around base point These rovers do not need synchron As a rover fix at one point one baseline is formed Several rovers then can form many baselines which have the same base point like a star It is suitable for level D and E survey Normal This way is just the general way for customers You just follow the user manual and do not need to have many professional knowledge Detailed way is using 3 or more receivers fixing on points to do the static surveying for a certain while usually 40 60 minutes simultaneously This moment one polygon is formed by these receivers After the first surveying time is over move these receivers to other points doing the same surveying job another polygon is formed by the second time surveying but make sure that the two polygons should have common side The whole GPS network is formed by these polygons It is suitable for level C and D survey We will introduce the GPS network in the following chapter 6 4 4 Shapes of GPS Network Depend on different applications sh
15. s are saved at the same path as your original files on your PC A3 User manual Detailed pictures are shown below N Pa zm a 1 E 1 1 p 3 F er La 1e S 1 r d oe wT po Se oi ui TAT D a m eT N 1 p SH vr 1711 FT aie S lel ial PECA 1 ECAC e a SiG moms Suited ara ane k vr Ce Tat BP m L P 7 When you have seen the window information RINEX Translation finished then press OK you can see the network and baselines for your static surveying ieee Fir L Hi DP sta FEFEFE EETTT Z 29229282 E ETEEEE P re REGR EMR RRR 3a8HBESRER 8 Using FOIF post processing software FGO Geomatic Office 2008 to do the office work Detailed ways are shown in the user manual of FOIF Geomatics office 2008 6 3 Ways of Outdoors Working for Static Surveying 1 Surveyors should give a general understanding about their surveying district such as point position difficulties of making point and also includes the economic level culture custom traffic situation etc at that place 2 Ephemeris forecast Good surveying opportunities should depend on the surveying position and the latest satellite ephemeris The satellite 11 A3 User manual ephemeris includes many aspects e g visibility of satellites satellite constellation PDOP etc If big building is beside the point then you should give a conclusion on whether this big object would influence the static surve
16. tails the possible flash patterns to indicate various states of the receiver operation Battery BAT Satellite SAT Record REC Receiver OFF OFF OFF OFF Receiver ON capability lt 10 A3 speaks to you a NMP O light flash 1 time Capability 10 100 per second Green light Record data flash 2 a Green light fast flash times means the tracking SVs usable numbers Flash interval means the interval of record 5 4 The Batteries and Power The receiver can be powered by taking out its battery to the charger or by an external power source connected to Power Port directly If an external power source is connected to Power Port it is used in preference to the internal battery The battery charge sequentially and take approximately five hours each to fully charge 5 4 1 Battery Charging and Storage All battery types discharge over time when they are not being used Batteries also discharge faster in colder temperatures If a Lithium ion battery is to be stored for long periods of times make sure it is fully charged before storing and re charged at least every three months A3 User manual 5 4 2 Charging the Lithium ion Battery Charge the battery completely before using it for the first time If the battery has been stored for longer than six months charge it before use A battery that has reached the deep discharge level can t be recharged and must be replaced The following recommendations provide optimal p
17. ted 1n the adjacent points 2 GPS network designing 19 suggested 3 The sides for every part of network should not exceed 6 4 High precision EDM instrument is recommended to use together with GPS receivers 5 Leveling points should be equally spread in the district for better elevation fitting 6 Surveying time times could be added appropriately for higher precision surveying 7 Known points should be equally spread in the district for better precision surveying A3 User manual 7 Factory Settings All receiver settings are stored in receiver Whenever the receiver is rest to its factory defaults the current settings are reset to the factory values You can t modify the factory settings 5 O Elevation mask PDOP mask Point ID The frequency of getting 1Hz data The Minimum record SVs Coordinate standard Longitude DDD MM SS SSSSS E W Position data format Latitude DD MM SS SSSSS N S elevation HHHH HHH M 18 A3 User manual 8 Optional Accessories Tribrach YGFDQ2B Tripod YGM170H Wooden tripod YGMJ170 Aluminum tripod A3 User manual 9 Specifications 9 1 Physical Specifications Feature Specification Dimensions 197x101mm H Weight 1 5kg Include battery Operating time 12 hours Operating temperature 30 C to 65 C Storage temperature 40 C to 75 C Humidity 100 condensing Water Dust proof IP67 IEC529 Drops 2M 6 56ft fall down onto ceme
18. ying on that point 3 Give a detailed surveying procedures on the paper 4 Field surveying Comply with the surveying rules and related receiver user manual to lead your job 5 Data transferring Check the consistency between field nodes and receiver recording by PC 6 Process baselines to determine the accuracy of your surveying thus leading your next working plan 7 Finish working if there has no problem in step 6 and then print your adjusted results report 6 4 GPS Network 6 4 1 Network Designing 1 The baselines should be closed Single baseline 1s not accepted in the designing 2 It is not right to say that the more the baselines the better the results are Three baselines for one point is suitable for the reliability of network 3 For getting the higher accuracy of the point one point for two times surveying is suggested 4 In order to convert GPS system to your local coordinate system you should have at least 3 to 5 higher accuracy known point that are equally spread in the district for your good coordinate converting At the same time if you want to get your good elevation of the surveying points then you should have certain leveling points for your research on the elevation of your surveying district 12 A3 User manual 5 Considering the convenience of static surveying it is suggested for you to design your points in the filed place where you are easy going 6 4 2 Accuracy Standard in Static Survey
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