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A three-dimensional model for acoustic scattering from rough ocean bathymetry

✍ Scribed by R.N. Baer; D.H. Berman; J.S. Perkins; E.B. Wright

Publisher
Elsevier Science
Year
1985
Tongue
English
Weight
569 KB
Volume
11
Category
Article
ISSN
0898-1221

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✦ Synopsis

Scattering of acoustic waves by rough bathymetry is an important factor influencing the performance of array systems. This paper discusses a computer model that calculates the directional distribution of bottom-scattered energy received at an array. The model simultaneously includes the effect of bathymetric scattering and refraction caused by a varying sound-speed structure in the water column. The numerical techniques used include the split-step solution to the parabolic equation approximation to the Helmholtz equation away from the boundary. propagation of the coherence function near the boundary. and a modified Kirchhoff formulation to incorporate scattering. An exponential substitution approximation. which can reduce the computation time of the scattering component by two orders of magnitude wtth little loss in accuracy, is described.

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