Advanced Marine Technology: Benthic Array

An ocean bottom seismic recording capsule has been designed, constructed, and tested. It contains a Block-Moore quartz torsion fiber accelerometer, a two-axis tilt-meter, a current speed meter, a thermometer, and digital recording and control electronics. The sensors and recording electronics are co...

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Bibliographic Details
Main Authors: Prothero, Jr , William A, Munk, Walter H
Format: Report
Language:English
Subjects:
ACCELEROMETERS
ANOMALIES
BACKGROUND NOISE
CONSTRUCTION
DESIGN
EARTH CRUST
EARTHQUAKES
FLOWMETERS
GROUND MOTION
MICROSEISMS
OCEAN BOTTOM
QUARTZ
SEISMIC ARRAYS
SEISMIC DETECTION
Seismic Detection and Detectors
SEISMIC DISCRIMINATION
SEISMIC NOISE
Seismology
TEST METHODS
TIDES
TILTMETERS
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Description
Summary:An ocean bottom seismic recording capsule has been designed, constructed, and tested. It contains a Block-Moore quartz torsion fiber accelerometer, a two-axis tilt-meter, a current speed meter, a thermometer, and digital recording and control electronics. The sensors and recording electronics are contained in three 22 inch I.D. pressure spheres made from Alcoa aluminum hemispheres. The capsule rests on the ocean floor without lines to the surface. Upon acoustic command, an explosive cable cutter separates the positively buoyant instrument capsule from a support tripod and battery frame. The capsule then floats to the surface for recovery. The acoustic system has both command and diagnostic capabilities. Digital diagnostic data is transmitted to the surface at 100 bps. Microseisms and earthquakes have been recorded. Sponsored in part by DARPA. See also AD0283189.