Accession Number : ADA302491

Title :   Identification of Presumed Shallow Underwater Chemical Blasts Using Land-Based Regional Arrays.

Descriptive Note : Scientific rept. no 2,

Corporate Author : ENSCO INC SPRINGFIELD VA

Personal Author(s) : Buamgardt, Douglas

PDF Url : ADA302491

Report Date : 24 JUL 1995

Pagination or Media Count : 39

Abstract : The problem of the identification of underwater blasts has gained increased interest recently in the context of the monitoring of a possible comprehensive test ban treaty (CTBT). At the recent CTBT Monitoring Technologies Conference, held in Sand Diego in September of 1994, a number of papers were presented which reviewed how the hydroacoustic method can be used to monitor underwater explosions. Underwater explosions can be identified by distinctive features, primarily bubble-pulse signatures and fast rise times, recorded on high frequency hydroacoustic signals. These signatures may be observable over distance ranges in the ocean in excess of 1000 km because of the unique propagation conditions in the SOFAR channel of the deep ocean. Some of the papers at the CTBT Conference (e.g., Phillips, 1994) suggested that these kinds of signatures could only uniquely be detected and analyzed using hydoacoustic sensors, and that seismic sensors had limited utility because of their location and limited bandwidth. jg p.7

Descriptors :   *CHEMICALS, *ARRAYS, *UNDERWATER EXPLOSIONS, *LAND AREAS, *SHALLOW DEPTH, TEST AND EVALUATION, PROPAGATION, HIGH FREQUENCY, SYMPOSIA, DETECTORS, MONITORING, SAND, PULSES, BUBBLES, SIGNATURES, ACOUSTICS, OCEANS, TREATIES, BANDWIDTH, RADIO SIGNALS, UNDERWATER SOUND, DEEP OCEANS, UNDERWATER SOUND SIGNALS, SEISMOMETERS.

Subject Categories : Underwater Ordnance
      Undersea and Antisubmarine Warfare
      Explosions
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE