Parabolic Equation Model

Abstract

This report deals with a parabolic propagation model now implemented at the Marine Physical Laboratory. This parabolic equation (PE) program is a FORTRAN 77 version of the SACLANTPAREQ program. The parabolic methods were a major development in the field of acoustic modeling. The advantage of the method is the simple way range dependence is handled. Diffraction effects are included, but neither reverberation nor backscattering are accounted for in an earlier document. The parabolic equation requires small angles of propagation from the horizontal and cannot handle steep sound velocity gradients or high frequency propagation because of computer speed considerations. The parabolic equations are derived, the associated numerical algorithms are presented, the environment and the program inputs are described. Finally examples are given. The goal of this report is to provide the potential user the necessary information to understand and use the PE program. Keywords: Differential equations.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1988
Accession Number
ADA197480

Entities

People

  • Jean-marie Tran

Organizations

  • Scripps Institution of Oceanography

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Acoustic Propagation
  • Acoustic Waves
  • Acoustics
  • Algorithms
  • Deep Water
  • Differential Equations
  • Diffraction
  • Environment
  • Equations
  • Frequency
  • Phase Velocity
  • Plastic Explosives
  • Refraction
  • Refractive Index
  • Security
  • Transmission Loss
  • Underwater Acoustics

Readers

  • Computer Science.
  • Wave Propagation and Nonlinear Chaotic Dynamics.