Keywords : subop


General presentation

In 2006-2007, Ifremer has developed a new acquisition system for the sub-bottom profilers (SBP). The acquisition part is achieved from a Windows PC with National Instrument acquisition devices (analog input and output). A new acquisition software, called SUBOP (SUb-BOttom Profiler), has been developed in C++ and C# with Visual Studio 2005 (and VS2008). With this new software it is possible to generate the transmitted signal and to acquire the received signals, to interface other onboard sensors (navigation, bathymetry, motion sensors) and to record the data in the standard SEGY format. A copy of the user interface is represented below.

The SUBOP acquisition system is installed and used for the SBP of the deep-sea RV Pourquoi pas?, Suroît et L'Atalante, for the SBP of the survey boat Haliotis and for the SBP of the AUV AsterX and IdefX. SUBOP is also used for the acquisition with the sparker seismic system and with the towed vehicle EDO.

Main functions

The main functions of the SUBOP software are listed below:

  • System configuration: definition of the interfaces with the external sensors, with the electronic parts, with the printer…
  • Option to use specific parameters according to the water depth.
  • Control of the power electronics and the reception chain.
  • Interface with the external sensors (nav, bathy, motion sensors, external synchronization).
  • Noise level estimate on the reception chain.
  • User interface displays :
    • 3 displays: profile, trace and spectrum.
    • Display of the acquisition parameters and of the data from external sensors.
    • Alarm display
  • Automatic computation of the recording delay according to the water depth.
  • 3 configurations for the acquisition: simple-ping / multi-ping / external synchronization.
  • Compensation of the vessel’s movements (pitch, roll, heave).
  • Real time printing of the seismic profile on an EPC printer.
  • Possible use on the AUV.
  • Raw data recording in the standard SEGY format (option for dual-recording).
  • Replay of the acquired data.