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Ocean Bottom Seismometer Specifications
Width on deployment is 1.02 meters or 40 inches and 0.69 meters or 27 inches on recovery.
Height on deployment is 0.97 meters or 38 inches and 0.97 meters or 38 inches on recovery.
Weight on deployment is 170 kilograms or 375 pounds and 127 kilograms or 275 pounds on recovery.
The anchor configuration is a flat metal plate 1.02 meters (or 40 inches) in diameter with a weight of 45.4kilograms. (or 100 pounds).
The deployment depth limit is 5,000 meters.
The operational temperature limits - (in degrees Celcius) are 5 to 40.
The storage temperature limits - (in degrees Celcius) are -20 to 50.
The sensors are three, 4.5 Hz L15B geophones and one OAS E-2S hydrophone.
The configuration of the geophones is gimbled on 3 axis.
The time of day clock is a Seacan Timing Module with a drift rate of 5 x 10-8 per month.
The recording system is digital.
The digital sampling sample rates are 5,10, and 20 milliseconds. (200, 100 and 50 samples per second).
The number of sensor channels that can be recorded is 4.
The total dynamic range of th recorded data is 72 dB (AD converter) plus a 30 dB (1-step gain range) for each data point.
The raw data is recorded in binary format with header information for each 1 Mgabyte of information.
The data is converted to SEGY format after retrieval.
The relocation aides are a flashing strobe, VHF radio beacon, and acoustic transponder.
The release method is acoustic, with ranging capabilities.
The total battery life is 60 days using Alkaline batteries.
The total record time is 45 days of continuous recording.
The number of OBS's available is 12.