A 3D linearized inverse scattering method for scatterers in a two layered medium

Kazushi Kimoto, Sohichi Hirose

Research output: Contribution to journalArticlepeer-review

Abstract

This paper presents a 3D linearized inverse scattering method for shape reconstruction of obstacles in a two layered medium. The problem here is to estimate the shape of an obstacle embedded in the bottom layer, using scattered waves observed at points in the top layer. Wave sources are assumed to be acoustic monopoles settled in the top layer. For this situation, two inversion formulas based on the Born and the Kirchhoff approximations are proposed with the help of the Green's function for the layered medium. In numerical examples, the two inversion formulae are tested for reconstruction of spherical and spheroidal rigid scatterers from simulated wave data. It is shown that an illuminated side of the scatterers is well reconstructed by the proposed methods.

Original languageEnglish
Pages (from-to)201s-207s
JournalStructural Engineering/Earthquake Engineering
Volume22
Issue number2
DOIs
Publication statusPublished - 2005

Keywords

  • Aperture limitation
  • Layered Medium
  • Linearized inverse scattering analysis
  • Ultrasonic testing

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Arts and Humanities (miscellaneous)
  • Geotechnical Engineering and Engineering Geology

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