PACIFIC 'SOFAR' VELOCITY CALIBRATION EXPERIMENT

• Main Author: Daubin, Scott C
• Other Authors: GM DEFENSE RESEARCH LABS SANTA BARBARA CA
• Format: Text
• Language: English
• Published: 1965
• Subjects: Explosions; *UNDERWATER EXPLOSIONS; *UNDERWATER SOUND; ACOUSTIC DETECTORS; ACOUSTIC RANGES; ALASKA; CALIBRATION; CALIFORNIA; CIRCUITS; COMPUTER PROGRAMMING; DETECTION; HAWAII; HYDROPHONES; MEASUREMENT; NUCLEAR EXPLOSIONS; PACIFIC OCEAN ISLANDS; PROPAGATION; REAL TIME; RECORDING SYSTEMS; SEISMIC WAVES; SEISMOLOGICAL STATIONS; SIGNAL TO NOISE RATIO; SONOBUOYS; STABILITY; TUGBOATS; UNDERWATER SOUND SIGNALS; VELOCITY; IBM 7040; SOFAR; VELA UNIFORM; Pacific; Alaska; Aleutian Islands
• Online Access: http://www.dtic.mil/docs/citations/AD0465633; http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0465633

Experimental results of SOFAR velocity measurements made between Hawaii and the California Coast and between Hawaii and certain islands in the Pacific in the summer of 1964 are given. Explosive source stations were located off Oahu, Hawaii, and the Aleutian Islands. A source location program for the IBM 7040 computer was developed and used to locate explosive sound sources from signals received at a widely spaced ensemble of receiving stations. Signals were recorded by various stations in the North Central Pacific and also by an acoustic monitoring buoy station anchored off the California coast. The objectives of the experiment were to obtain a measurement of the average propagation velocity in the Northeast Pacific over various long path lengths based on a statistically significant number of readings, and a measurement of the stability of this velocity over a period of several days.