NEW HORIZON CALCOFI ADCP MANUAL
Contents
1. You choose whether there is a dual output directory but don t write to a networked disk it tends to cause problems Transform TAB Heading Source choose ADCP compass gyro better for reliability Tilt source We choose to set the tilts manually to zero DO NOT ENABLE heading correction because we want the txt file to have precendence see p 56 in the VMDAS user manual EV set to 0 EA fixed transducer misalignment There should be only one EA command in use but it can be in one of two places If you are using a text file there is an EA command which we set to match the NH alignment EA045 In that case the EA command in the gui should be zero AND head ing correction should not be enabled VmDAS will use the value from the text file DO NOT ENABLE tilt correction None of these things should change between cruises Averaging TAB 60 seconds for STA short time averages The standard for ADCPs is 5 minutes or 300 seconds for LTA ENABLE reference layer bins 3 10 is fine Data Screening TAB not needed User Exits TAB not needed Simulated Inputs TAB not needed OS75 BB8 TXT Jomo renee nen M ADCP Command File for use with VmDas software ADCP type 75 Khz Ocean Surveyor Setup name default Setup type High resolution short range profile broadband NOTE Any line beginning with a semicolon in the first column is treated as a comment and is ignored b2. Load Crt File Open MDAS Load Option File Start Data Collection Stop Data Collection Close VMDAS Quit amp uta DCP Region File c Program Files AutoADCP BB150_REGION DAT Ini Option File E Program Files RD Instruments VMDAS BB150_C ADCP Txt File C Program Files RD Instruments V mDas BB150_Ch ie a AutgADCP History for M AS 6 13 02 16 15 35 UTC Opened VM DAS via Restart VMDAS View Edit Region File 6 13 02 16 15 38 UTC Loaded IniFile C Program Files RD Instruments go 6 13 02 16 15 40 UTC Started Data Collection View Edit Ini File 6 13 02 16 15 45 UTC Stopped Data Collection 6 13 02 16 15 46 UTC Closed VM Das View Edit Txt File 6 13 02 16 57 17 UTC Opened VM Das 6 13 02 16 57 21 UTC Loaded IniFile C Program Files RD Instruments NV Comment for Hist File 6 13 02 16 59 17 UTC Started Data Collection GPS GMT Time 6 13 02 19 05 48 UTC Started AutoADCP AD 6 13 02 19 05 51 UTC Opened VM Das 19 24 32 6 15 02 19 05 58 UTC Loaded IniFile C Program Files RD Instruments Ship s Position 6 13 02 19 06 01 UTC Started Data Collection 69 992 N i 164 402 W Figure 1 Illustration of the AutoADCP screen during data collection Running the AutoADCP Double click the AutoADCP desktop icon to start it Options are listed in the menu across the top of the window Fig 1 Starting left click on Load Cnt File You will choose A CalCOFI AutoADCP Autoadcp cnt After t
3. 26 W 124 W 122 W 120 W 118 W Figure 2 Boundary for changing fom shallow to deep ini file VmDas This section gives instructions on how to run VmDas should the AutoADCP system fail to work 1 Start VmDas double click the icon on the desktop 2 File gt Collect Data 3 Options gt Load gt Choose INI file choose CACalCOFDIAutoADCP Default calcofi ini 4 Control gt Go to start data collection During the steam home you will need to interrupt data collection and turn bottom track on 5 Options gt Load gt Choose INI file choose shallow ini C CalCOFI AutoADCP shallow ini INITIAL SETUP VMDAS TABS This section gives instructions on how to setup the New Horizon Ocean Surveyor 75 kHz for CalCOFI ADCP data collection Each heading below describes the entries within a tab in the VMDAS setup screens If the setup was verified in port use this to start data collection and as a checklist for normal operation To begin 1 Start VMDAS double click the icon 2 File gt Collect Data 3 Options gt Load gt Choose INI file choose shallow ini if you will toggle between deep and shallow otherwise choose Default calcofi ini for the default setting CalCOFI ini and txt files are in the directory C CalCOFI AutoADCP 4 Options gt Edit Data Options gt see following sections Communications TAB Options gt Edit Data Options gt Communications Hardware setup 1 gyro going int
4. NEW HORIZON CALCOFI ADCP MANUAL APRIL 2005 Instructions for Jamie AutoADCP We hope to run VmDas a Microsoft Windows data acquisition program for ADCPs from the AutoADCP program AutoADCP s purpose is to provide a method for unattended operation of shipboard ADCPs that use VmDas CalCOFI NH0504 is our first use of both AutoADCP and VmDas The primary functions of AutoADCP are to change configuration based upon the ship s location and to assure that data collection continues by means of a watchdog timer At intervals the AutoADCP routine determines the ship s position by reading the last GGA entry in the most recent NIR file the text file where VmDas logs GPS data This position is then compared with regions in the position dat file For CalCOFI the position file determines the approximate boundary of the 500 m isobath and the VmDas configuration should switch from shallow ini to deep ini based on location In shallow water we will run the ADCP in broadband mode with bottom track on and 3 sec between ensembles to account for a 2 ping cycle In deep water we will run the ADCP in narrowband mode to maximize range with a 2 sec ping cycle Once the data acquisition begins we would like you to fill out a log sheet at regular intevals each day The purpose is over the course of the cruise to make sure that data acquisition continues The items that you log should change with time time should be current the position shou
5. ack mode This helps with calibration of the data during processing and is a good sanity check for the instrument but it wastes too many pings if you re in open water You need to lengthen the Ensemble Time see below to account for the fact that there are 2 pings per ensemble a bottom track ping and then a water track ping 0875 bb8 txt UPPER 500m higher precision mode Use broadband pings with 8 meter resolu tion to get better vertical resolution and higher precision at the expense of depth penetration 0875 nb16 txt DEEP OCEAN loaded via deep ini lower precision mode This is the pre ferred mode for CalCOFI If the cruise is in the open ocean and the scientists on board are inter ested in currents as deep as possible use narrowband pings with 16 meter bins Deepest profiles might be to 800m but with lower vertical resolution scenario text file Ensemble Time BOTTOM TRACK os75 bt txt 3 UPPER 500m os75_bb8 txt 2 DEEP 0875 nbl6 txt 2 best default double these durations for 38K Hz remember when RDI put together their defaults they were being conservative but this is at the expense of the number of pings in the water 2 Set time between Ensembles We recommend loading a new ini file when you change con figs the ini file loads the correct text file AND changes the time between ensembles will be changed automatically Otherwise you have to do 2 things manually in the gui load the text file and change the
6. ation echo intensity percent good WD111100000 One and a half seconds between bottom and water pings TP000150 Three seconds between ensembles Since VmDas uses manual pinging TE is ignored by the ADCP You must set the time between ensemble in the VmDas Communication options TE00000300 Set to calculate speed of sound no depth sensor external synchro heading sensor no pitch or roll being used no salinity sensor use internal transducer temperature sensor EZ1020001 Output beam data rotations are done in software EX00000 Set transducer misalignment hundredths of degrees CHECK THIS EA04500 Set transducer depth decimeters CHECK THIS EDO00050 Set Salinity ppt ES35 save this setup to non volatile memory in the ADCP CK
7. he file loads AutoADCP will have all of the path information that it needs to find other files The name of the region file should display in the GUI and the History window will display any previous history Next click on Open VmDas VmDas will open in a new window with a blank screen Load Option File causes VmDas to collect data and to load the default option file The VmDas screen should now show some displays If that fails to happen close VmDas using the menu button on the top of the AutoADCP GUI then repeat the last 2 steps open VmDas and load the options file At this point the option and txt file names should display in the GUI We initialize with calcofi default ini Start Data Collection The output file preface will display in the GUI GPS time and position remain blank until the navigation file is queried about 1 min Soon AutoADCP should switch to shallow ini as you leave port The ini option file lets you know whether the program thinks you are shallow or deep Our line is pretty crude see Figure 2 At the end of the cruise stop data collection from the AutoADCP otherwise it may notice data collection has stopped and try to restart VmDas Then close VmDas and quit AutoADCP using the menu buttons 36 N 4 34 N 32 N 30 N 120 Line 93 rad 1
8. hro heading sensor no pitch or roll being used no salinity sensor use internal transducer temperature sensor EZ1020001 Output beam data rotations are done in software EX00000 Set transducer misalignment hundredths of degrees CHECK THIS EA04500 Set transducer depth decimeters CHECK THIS EDO00050 Set Salinity ppt ES35 save this setup to non volatile memory in the ADCP CK OS75_BT TXT ne eU ADCP Command File for use with VmDas software ADCP type 75 Khz Ocean Surveyor Setup name default Setup type High resolution short range profile broadband NOTE Any line beginning with a semicolon in the first column is treated as a comment and is ignored by the VmDas software NOTE This file is best viewed with a fixed point font e g courier Modified Last 12August2003 Restore factory default settings in the ADCP cri set the data collection baud rate to 38400 bps no parity one stop bit 8 data bits NOTE VmDas sends baud rate change command after all other commands in this file so that it is not made permanent by a CK command cb611 Set for broadband single ping profile mode WP eighty WN 8 meter bins WS 8 meter blanking distance WF 390 cm s ambiguity vel WV NPO WP00001 WNOO80 WS800 WF0800 WV390 Enable single ping bottom track BP Set maximum bottom search depth to 1200 meters BX BPOO1 BX12000 output velocity correl
9. ld change and should match your current location the ini file should change from shallow to deep and back again and the data files should grow Aside from controlling the current configuration file the AutoADCP routine periodically checks that the data collection process is continuing by checking the size of the ENR file raw pingdata of the highest numbered data collection session If the ENR file has not changed in size since the last time it was queried the routine assumes that data collection has stopped prematurely It will use the Windows task manager to stop VmDas and then attempt to restart it and continue This is referred to as a software watchdog It will not protect against a system crash so a human watchdog YOU is still greatly appreciated AutoADCP will not check the N2R file where our Ashtech GPS heading logs For that we will ask you to open a window in C ADCPDATA and periodically run a Unix tail grep in order to log Ashtech heading and to check that it is updating Ashtech acquisition has been problematic on New Horizon If it stops give the receiver a hard reset It should not be necessary to restart AutoADCP or VmDas When you re close to port Stop Data Collection Stop VmDas Quit the AutoADCP and copy everything in C ADCPDATA to a folder on the USB drive Contact info Teri Chereskin 858 534 6368 tchereskin ucsd edu Sharon Escher 858 822 4965 sescher ucsd edu ij AutoADCP for M DAS Inf x
10. o the deck unit as a synchro feed 2 pcode or other reliable GPS as a serial feed 3 GPS heading device such as ADU POSMV or Seapath as a serial feed Presently the New Horizon has an ADUS and the Melville has a POSMV Set up com ports for ADCP GPS positions and GPS heading the GPS port gets written to the NIR files It should have GGA and optionally VTG messages but nothing else the GPS heading port gets written to the N2R files It should also have a GGA message if one is available the attitude heading and tilts message and any quality messages that are relavant For instance a Seapath should have PSXN 20 for attitude and PSXN 22 for quality NOTES 1 until VmDAS bug is fixed if you have a POSMV you should output BOTH PRDID and PASHR messages Then someone can use PRDID if they want but the quality information is still there for later PRDID has no quality indicator 2 Keep the number of extra messages to a minimum VmDAS can choke if it has too many serial messages The LOG files get really big and can stop data acquisition ADCP Setup TAB Options gt Edit Data Options gt ADCP Setup 1 Choose the text file to use under ADCP setup from file Three likely scenarios are 0875 bt txt BOTTOM TRACK ON loaded via shallow ini If the cruise is going to be over shallow water under 500m for over 6 hours transiting over a shelf for instance it is a good idea to put it in bottom tr
11. t ES35 save this setup to non volatile memory in the ADCP CK OS75 NB16 TXT M ADCP Command File for use with VmDas software ADCP type 75 Khz Ocean Surveyor Setup name default Setup type Low resolution long range profile narrowband NOTE Any line beginning with a semicolon in the first column is treated as a comment and is ignored by the VmDas software NOTE This file is best viewed with a fixed point font e g courier Modified Last 12August2003 Restore factory default settings in the ADCP cri set the data collection baud rate to 38400 bps no parity one stop bit 8 data bits NOTE VmDas sends baud rate change command after all other commands in this file so that it is not made permanent by a CK command cb611 Set for narrowband single ping profile mode NP fifty NN 16 meter bins NS 8 meter blanking distance NF WPO NNO50 NP00001 NS1600 NFO800 DISABLE single ping bottom track BP Set maximum bottom search depth to 1200 meters BX BPO00 BX12000 output velocity correlation echo intensity percent good ND111100000 One and a half seconds between bottom and water pings TP000150 Three seconds between ensembles Since VmDas uses manual pinging TE is ignored by the ADCP You must set the time between ensemble in the VmDas Communication options TE00000150 Set to calculate speed of sound no depth sensor external sync
12. time between ensembles Change the gui Ensemble Time so it is consistent with your instrument s frequency This is done to maximize the number of pings that go in the water The RDI default settings are conservative i e they are designed so you won t have ruined data but you do have fewer pings per average NOTE Ensemble Time here refers specifically to the bottom of the ADCP Setup Tab and it refers to the seconds between ensemble where an ensemble is usually just one watertrack ping or might be a pair of pings one bottomtrack ping and one watertrack ping This setting DOES NOT have anything to do with the averaging of the data later It is important to remem ber to change the Ensemble Time to match the ping pattern The computer actually tells the instrument when to ping the ADCP doesn t figure that out for itself If it s too small you may have interference If it s too large you waste the opportunity to ping Recording TAB Options gt Edit Data Options gt Recording Data should record to the directory C ADCPDATA primary C secondary It s probably easiest to have the data always end up in the same directory and choose a new de ployment name to use this name will be part of the VMDAS file names Then after the cruise you can stop logging and use a file browser to move the data to a different directory For Cal COFI data we choose calcofi Max size 2 5Mb We use 5Mb or they re too large to load easily
13. y the VmDas software NOTE This file is best viewed with a fixed point font e g courier Modified Last 12August2003 Restore factory default settings in the ADCP cri set the data collection baud rate to 38400 bps no parity one stop bit 8 data bits NOTE VmDas sends baud rate change command after all other commands in this file so that it is not made permanent by a CK command cb611 Set for broadband single ping profile mode WP eighty WN 8 meter bins WS 8 meter blanking distance WF 390 cm s ambiguity vel WV NPO WP00001 WNO80 WS0800 WF0800 WV390 DISABLE single ping bottom track BP Set maximum bottom search depth to 1200 meters BX BPO00 BX12000 output velocity correlation echo intensity percent good WD111100000 One and a half seconds between bottom and water pings TP000150 Three seconds between ensembles Since VmDas uses manual pinging TE is ignored by the ADCP You must set the time between ensemble in the VmDas Communication options TE00000150 Set to calculate speed of sound no depth sensor external synchro heading sensor no pitch or roll being used no salinity sensor use internal transducer temperature sensor EZ1020001 Output beam data rotations are done in software EX00000 Set transducer misalignment hundredths of degrees CHECK THIS EA04500 Set transducer depth decimeters CHECK THIS EDO00050 Set Salinity pp
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