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Home page > Instruments and Data > The OBSs > OBSs courte-periodes (SPOBS)

OBSs courte-periodes (SPOBS)

by DANIEL Romuald - 10 October 2011

These instruments contain a 4.5 Hz three-axis geophone and a hydrophone. The are designed for active seismics (refraction and reflection) and local passive seismology. They can be deployed for more than one year.

Technical Specifications

Acquisition : L-CHEAPO

  • 24 bits
  • From 30 to 1000 samples per second
  • Seascan MCXO clock
  • Power consumption : 540 mW at 250 sps and 4 canaux
  • Lithium or NiMH Batteries
  • Depth rating: 5000 meters
  • Design: Scripps Institution of Oceanography

Sensors :

  • Motion: Mark Systems/Sercel L-28 geophone
    • 3 axes 4.5 Hz
    • optional: Mark Systems L-22: vertical 2.2 Hz
  • Pressure: HiTech HYI-90-U hydrophone
    • Bandwidth 50 mHz - 15 kHz

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