NDLI: Reverberation vertical coherence and sea-bottom geoacoustic inversion in shallow water

Content Provider	IEEE Xplore Digital Library
Author	Ji-Xun Zhou Xue-Zhen Zhang Rogers, P.H. Simmen, J.A. Dahl, P.H. Guoliang Jin Zhaohui Peng
Copyright Year	1976
Abstract	Optimal array-processing techniques in the ocean often require knowledge of the spatial coherence of the reverberation. A mathematical model is derived for the reverberation vertical coherence (RVC) in shallow water (SW). A method for analysis of RVC data is introduced. Measured reverberation cross-correlation coefficients as a function of time and frequency, obtained during the Asian Seas International Acoustic Experiment (ASIAEX) in the East China Sea, are reported. SW reverberation from a single shot provides a continuous spatial sampling of the surrounding sound field up to several tens of kilometers and holds valuable information on the geoacoustic properties of the sea floor over this distance. SW reverberation data can, therefore, be used as the basis for a quick and inexpensive method for geoacoustic inversion and has the obvious advantage that acquiring the data in situ requires only a single platform. This paper considers the use of the vertical coherence of the reverberation as the starting point for such an inversion. Sound speed and attenuation in the sea bottom at the ASIAEX site are obtained over a frequency range of 100-1500 Hz by finding values that provide the best match between the measured and predicted RVC.
Sponsorship	IEEE Oceanic Engineering Society
Starting Page	988
Ending Page	999
Page Count	12
File Size	821792
File Format	PDF
ISSN	03649059
Volume Number	29
Issue Number	4
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-10-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Reverberation Geoacoustic inversion Frequency measurement Sea measurements Oceans Spatial coherence Mathematical model Data analysis Acoustic measurements Time measurement spatial coherence sea-bed geoacoustic inversion shallow-water (SW) acoustics
Content Type	Text
Resource Type	Article
Subject	Ocean Engineering Mechanical Engineering Electrical and Electronic Engineering

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