Solving the Parabolic Equation for Underwater Acoustic Propagation by the Split-Step Algorithm

Abstract

Mathematical models of underwater acoustic propagation are used in designing, deploying, and using underwater acoustic surveillance systems. This report documents a package of computer programs which solves the parabolic equation for underwater acoustic propagation using a split-step algorithm. These programs are implemented on the Texas Instruments Advanced Scientific Computer and make use of its pipelining and vectorizing capabilities. They include the ability to partially correct for the errors induced by the parabolic assumptions. All of the programs of this package can plot their outputs. These plots include sound-speed contours, sound-speed profiles, the initial pressure field, transmission loss as a function of range, transmission loss as a function of depth, transmission-loss histograms in specified range-and-depth regions, and intensity contours as a function of range and depth. The report summarizes the theory, describes the implementation, and tells how to run the programs.

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Document Details

Document Type
Technical Report
Publication Date
Aug 30, 1982
Accession Number
ADA119750

Entities

People

  • Evan B. Wright
  • John S. Perkins
  • Laura F. Roche
  • Ralph N. Baer

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Acoustic Propagation
  • Acoustic Surveillance
  • Acoustic Waves
  • Acoustics
  • Algorithms
  • Attenuation
  • Computer Programs
  • Computers
  • Equations
  • Frequency
  • Gray Scale
  • Grids
  • Helmholtz Equations
  • Losses
  • Magnetic Tape
  • Transmission Loss
  • Wave Propagation

Fields of Study

  • Physics

Readers

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