Phase Integral Algorithms for Signal Speeds in Range-Dependent Sound Velocity Profiles.

Abstract

This report presents two Fortran raytracing codes and related theory which are designed to treat underwater sound propagation in the presence of range-dependent sound velocity profiles (SVPs). Particular emphasis is placed on the average horizontal ray velocity and its variation as a ray traverses different SVPs. Efficient calculation of this variation is of great importance for improved modern multisensor localization techniques. The adiabatic invariant approximation agrees well with exact raytracing results even for strongly inhomogeneous sound velocity profiles. Simple algorithms are developed for demonstrating this and for computing the adiabatic invariant in arbitrary profiles for a user-selected family of rays.

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Document Details

Document Type
Technical Report
Publication Date
Jul 10, 1978
Accession Number
ADA075131

Entities

People

  • R. C. Shockley

Tags

Communities of Interest

  • Sensors

DTIC Thesaurus Topics

  • Adiabatic Conditions
  • Algorithms
  • Computational Science
  • Computations
  • Data Sets
  • Databases
  • Depression Angles
  • Detectors
  • Energy
  • Environment
  • Equations
  • Geometry
  • Integrals
  • Mechanics
  • Oceans
  • Refractive Index
  • Underwater Sound

Fields of Study

  • Physics

Readers

  • Acoustical Oceanography.
  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.