Vertically Bistatic Reverberation and the Back-Propagated Field with the Split-Step PE

Abstract

This report continues the modelling of reverberation from the sea surface and the ocean bottom interface with the parabolic equation model PAREQ using the split-step algorithm. A previous report used the principle of propagation reciprocity to compute the reverberation for source and receivers which were co-located. Here the reverberation scheme is generalized to allow for differing depths of source and receiver, thus going from monostatic to a 'quasi-bistatic' geometry. Additionally, the full reverberant field is modelled by back-propagating the scatter contributions from the boundaries. The is done including geometrical spreading in azimuth, which requires the contributions from different ranges to be propagated independently. The back-propagated field is compared to solutions from two ray models (GSM, MOCASSIN) and displayed both as a function of range, i.e. equivalent to a transmission loss contour plot, and as a standard reverberation plot vs time.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1994
Accession Number
ADB195870

Entities

People

  • H. G. Schneider

Organizations

  • SACLANT ASW Research Centre

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Backscattering
  • Boundaries
  • Convergence Zones (Sonar)
  • Equations
  • Geometry
  • Governments
  • Grazing Angles
  • Losses
  • Nato
  • Optical Lattices
  • Plane Geometry
  • Reverberation
  • Scattering
  • Steady State
  • Transmission Loss
  • Two Dimensional
  • Water

Readers

  • Acoustical Oceanography.
  • Wave Propagation and Nonlinear Chaotic Dynamics.