Freely Drifting Swallow Float Array: September 1985 Trip Report
SCRIPPS INSTITUTION OF OCEANOGRAPHY LA JOLLA CA MARINE PHYSICAL LAB
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Self-contained, freely-drifting Swallow floats capable of recording very low frequency 1-10 Hz ambient ocean noise are under development at the Marine Physical Laboratory, Scripps Inst of Oceanography, San Diego, CA. The floats are ballasted to neutral buoyancy at midwater depth where they record the components of particle velocity from which sound pressure levels may be derived. A high frequency acoustic mutual interrogation system may be used to determine relative float positions. During an experiment conducted between 9 and 13 September 1985 approximately 150 miles southwest of San Diego, five Swallow float buoys were deployed to depths of 1100 to 3600 meters over a 48 hour period. This technical memorandum reports preliminary results of that experiment. Keywords Swallow floats Ambient ocean noise Particle velocity and Very low frequency.