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Method of acoustic sweep monitoring of oceanic inhomogeneities (Review)

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Physics of Wave Phenomena : Volume 16, Issue 1, March 2008

Physics of Wave Phenomena : Volume 15

Method of acoustic sweep monitoring of oceanic inhomogeneities (Review)

Content Provider	Springer Nature Link
Author	Kuz’kin, V. M. Pereselkov, S. A.
Copyright Year	2008
Abstract	Theoretical grounds of the new method of monitoring of the temporal variability of oceanic inhomogeneities, which uses the data on frequency shifts of interference maxima of the sound field, were described. The method is free of limitations on both the resolution of signals coming in individual modes (rays) and the adiabatic approximation underlying the conventional methods of inhomogeneity reconstruction. The monitoring sensitivity was estimated, which allows us to estimate minimum detectable changes in the speed of sound by measurement data on frequency shifts of local maxima. Experimental data on shifts of the frequency spectrum of a broadband low-frequency signal on a stationary path in a shallow sea were presented. On their basis, the possibility of applying this method to diagnose tidal variations was shown. Within a numerical simulation, model reconstruction of the frequency spectrum of background internal waves was considered on the basis of the data on measurements of the spectrum of frequency shifts of the interference maximum. The results of the spectrum reconstruction with and without focusing of the conjugate wave field are presented. The problems of monitoring stability and efficiency with respect to the interference pattern formed by various groups of modes were discussed.
Starting Page	91
Ending Page	104
Page Count	14
File Format	PDF
ISSN	1541308X
Journal	Physics of Wave Phenomena
Volume Number	16
Issue Number	2
e-ISSN	1934807X
Language	English
Publisher	Allerton Press, Inc.
Publisher Date	2008-06-13
Publisher Place	Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Normal mode propagation of sound in water Hybrid and asymptotic propagation theories, related experiments Acoustics Quantum Optics, Quantum Electronics, Nonlinear Optics
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy

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