Shallow‐water in‐plane bistatic scattering experiment
作者:
D. Vance Crowe,
Paul C. Hines,
Patrick J. Barry,
期刊:
The Journal of the Acoustical Society of America
(AIP Available online 1998)
卷期:
Volume 103,
issue 5
页码: 3095-3095
ISSN:0001-4966
年代: 1998
DOI:10.1121/1.422963
出版商: Acoustical Society of America
数据来源: AIP
摘要:
Every reverberation experiment done in shallow water is by its nature, bistatic at long ranges. That is to say, in addition to simple monostatic returns, the received signal is composed of energy arriving along bottom bounce paths for which incident and scattered angles are different. Therefore, it is possible to measure in‐plane bistatic scattering strength using a monostatic geometry [Hines, Crowe, and Ellis, J. Acoust. Soc. Am. (in review)]. Noting this, a simple array consisting of a pair of free‐flooding‐ring projectors and two hydrophones was used to measure monostatic and bistatic scatter in 100 m of water on the Scotian Shelf. A series of linear FM (LFM) pulses was transmitted in four frequency bands over the range 900 to 2100 Hz. The reverberation data between the first bottom return and the first surface return provided estimates of monostatic backscatter strength for grazing angles down to 10°. Data arriving after the first‐bottom–first‐surface interaction provided estimates of in‐plane bistatic scattering strength for pairs of incident and scattered grazing angles (φi, φs) down to (7°, 57°). In this paper, the experiment and data are described in light of the monostatic and bistatic arrivals.
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