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Evaluation of the integrals of target/seabed scattering using the method of complex images
1DRDC-Atlantic, PO Box 1012, Dartmouth, Nova Scotia B2Y 3Z7, Canada.
Abstract:
In this paper the integrals which arise in target/seabed scattering problems are examined. These are the integrals which express the propagation of a spherical harmonic term in a fluid above or below a half-space and the integrals which compute the conversion coefficients of outgoing spherical harmonics into incident spherical harmonics after a seabed reflection. A very efficient and accurate method of computing these integrals, using the method of complex images, is derived. Numerical comparisons with the exact integral expressions show the accuracy of this approach.
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