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Russian Academy of Sciences

Experimental Design Bureau of

Oceanological Engineering

   
 Rambler's Top100

Autonomous bottom seismic station ABSS-1

Х OBS has been tested in Black Sea and Mediterranean Sea.

Х Marine operations in Mediterranean Sea 2003, investigations of sediments and basement, 21 deployments. Х Marine operations in Indian Ocean Nov. 2003 Ц Feb. 2004, seismic investigations of crust structure. 101 deployments.

Х Geophysical investigations in Pacific Ocean, 2006, 40 OBSs

 

Autonomous bottom seismic station ABSS-1

Carrier:

Aluminium sphere 450 mm

Max depth 6 000 m

Weight in air without anchor 40 kg

Anchor weight 40 kg

Buoyancy > 7 kg

Height 700 mm

Diameter 560 mm

mmersion velocity 1,7 m/s

Emersion velocity 1,0 m/s

 

 

Autonomous bottom seismic station ABSS-1

Hydro acoustic release:

Distance 8000 m

Distance measurement accuracy 15 m

Autonomous power supply 12 V

Emergency triggering by autonomous timer

 

Seismometers:

3D seismometer in gamble (up to 450 inclination)

Geophone sensitivity 2000 V/m/s

Hydrophone sensitivity 25 mkV/Pa

Frequency range 1 Ц 125 Hz (0,5 - 40 Hz optional)

Seismo-acoustic frequency range 1,0 Е 1000 Hz

 

Autonomous bottom seismic station ABSS-1

Onboard equipment:

GPS block for OBS starting and synchronization

Data transmission from OBS FL ASH memory to PC HDD

Shipboard unit & hydroacoustic antenna with cable for the hydroacoustic release control

 

Power consumption 3,2 W

Record time: Min (2 ms) 110 hours (4,5 days) Max (16 ms) 744 hours (30 days) Power supply - rechargeable battery 6 V

Autonomous bottom seismic station ABSS-1

Digital recorder:

4-th channel ADC 24 bits

Sampling rate 2, 4, 8, 16 ms

Accuracy of the precise time generator 10 sec

FLASH memory 2 Gb (optionally 4 - 20 Gb)

3D compass, accuracy ± 2∞

Temperature sensor, accuracy ± 0,1∞—, switch on/of by timer

 

Autonomous bottom seismic station ABSS-1  Autonomous bottom seismic station ABSS-1  Autonomous bottom seismic station ABSS-1  Autonomous bottom seismic station ABSS-1  Autonomous bottom seismic station ABSS-1

 

 

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