Inversion of the Acoustic Plane Wave Reflection Response of a Layered Ocean Bottom.

Abstract

The implementation of a recently proposed inversion scheme for the scattering of acoustic plane waves by a layered ocean bottom is described. As a result of applying the forward scattering approximation to a local wave decomposition of the acoustic field, the reflection coefficient is obtained as a nonlinear Fourier transform of the logarithmic derivative of admittance. Inversion of the integral transform enables the recovery of admittance versus depth via numerical integration of the impulse response of the sea bottom. Separate recovery of both density and sound speed profiles requires two impulse responses corresponding to two district grazing angles. The capability of the inversion scheme is illustrated for three inhomogeneous models for which bandlimited impulse responses were generated synthetically. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Aug 04, 1983
Accession Number
ADA132794

Entities

People

  • D. J. Thomson
  • R. K. Chow

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Acoustic Fields
  • Acoustic Propagation
  • Acoustic Properties
  • Bottom Loss
  • Computational Science
  • Differential Equations
  • Equations
  • Forward Scattering
  • Frequency
  • Frequency Response
  • Grazing Angles
  • Integrals
  • Inverse Problems
  • Mathematical Models
  • Numerical Integration
  • Plane Waves
  • Refractive Index

Fields of Study

  • Physics

Readers

  • Acoustical Oceanography.
  • Approximation Theory.