Past operations & data Scientific equipment
Communications / Navigation / Tracking
Weather Ship contact info VHF Radio Call Sign: Maintenance ![]() ![]() Last update: June 26, 2020, at 08:55 PM |
SURVEY 2022Instrumentation diagramDrawing No. HC-001-E-G-001-1, Rev-A. Click to open PDF version. RTM3 Trigger interface
From RTM3 manual: RTM3 time stamp trigger input -- G = center coax; R = coax shield. Click to enlarge. Backup: Installing all software on Win 11 laptopIn order to prepare for future replacement of main seismic computer -- a 2008 vintage Dell Latitude D630 laptop running WinXP -- we attempted to install all software on a modern laptop. New laptop: Dell Latitude 7420
Adapters used
Installing Python interpreter and three librariesPYTHON INTERPRETER:
EXTERNAL LIBRARIES REQUIRED: Install three libraries: First open terminal window, then use these commands (assuming Python interpreter was installed in default directory, c:\Python27\): cd c:\Python27 .\python -m pip install -U pip .\python -m pip install pyserial==2.7 .\python -m pip install psutil Installing GEODE softwareInstall GNSS/Survey logger, and Mini-GUNCO software, in two new directoriesIn terminal window: cd c: mkdir HOVERCRAFT_GPS_2022 mkdir HOVERCRAFT_GUNCO_2022 Download:
Run the programs, in separate terminal windows: Terminal window #1: cd c:\HOVERCRAFT_GPS_2022 c:\python27\python .\hovercraft-GNSS-ver3-2020-07-13.py Terminal window #2: cd c:\HOVERCRAFT_GUNCO_2022 c:\python27\python .\gunco-ver4-2022-07-13.py Screenshot13 July, 2022: Three programs operating on WIN11 laptop: SURVEY 2020Laptops, 2x
GNSS units
Time stamping of airgun firing
![]() Under consideration: https://verif-i.com/product/gps-sync/ GEODE seismic recorderHardware
Software
USB to serial adapters
SURVEYS 2008 - 2019Single hydrophoneWe have been using: Splicing of hydrophone cableHydrophones are normally ordered unterminated. In order to splice the hydrophone cable to a suitable underwater pigtail cable (which is delivered with one connector; the other side is open) an inline cable splicing kit must be used:
Norwegian suppliers:
Interface between hydrophone AQ-18 / 6 ch streamer and GEODE recording systemClick to see large version: ![]() Interface between Teledyne AQ-18 Hydrophone / 6 channel mini-streamer and Geode Recording system - click to see large version. ![]() Recommended AQ-18 decoupling and wiring. The recommended decoupling is done in the interface box shown below. The interface is also furnished with a DC/DC-converter in order to provide a clean 12 Vdc power source for the hydrophone. Mini-streamer, 6 channels![]() Mini-streamer layout.
Seismic source
RecordingGeometrics Geode
GPS for time- and position stamping of data
Configuration for use with UBS based GPSIf a USB based GPS should be used, there is a problem as the Geode software only accepts serial port in the Keep('COM1') to Keep('COM4') range, see screenshot below. The USB based GPS will normally be assigned to a COM number in a higher range. So a remapping of COM port assignment need to be done. ![]() Geode software serial setup menu. Default COM port assignment and NMEA telegram output from ordinary USB/GPS shown below. ![]() Data from USB/GPS, default selection of telegrams. Re-assigning COM port to fall within the 1-4 range is accomplished from Control Panel -> Hardware -> Comport -> (properties of USB/GPS port) In advanced settings, you can force comport setting to an available number within the 1-4 range that Geode software accepts. Backup recording systemRef. notes on this page. |