A numerically accurate and robust expression for bistatic scattering from a plane triangular facet (L)

Gorm Wendelboe, Finn Jacobsen, Judith M. Bell

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

This work is related to modeling of synthetic sonar images of naval mines or other objects. Considered here is the computation of high frequency scattering from the surface of a rigid 3D-object numerically represented by plane triangular facets. The far field scattered pressure from each facet is found by application of the Kirchhoff approximation. Fawcett [J. Acoust. Soc. Am. 109, 1319-1320 (2001)] derived a time domain expression for the backscattered pressure from a triangular facet, but the expression encountered numerical problems at certain angles, and therefore, the effective ensonified area was applied instead. The effective ensonified area solution is exact at normal incidence, but at other angles, where singularities also exist, the scattered pressure will be incorrect. This paper presents a frequency domain expression generalized to bistatic scattering written in terms of sine functions; it is shown that the expression improves the computational accuracy without loss of robustness. © 2006 Acoustical Society of America.

Original languageEnglish
Pages (from-to)701-704
Number of pages4
JournalJournal of the Acoustical Society of America
Volume119
Issue number2
DOIs
Publication statusPublished - Feb 2006

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