Investigation of range dependent underwater acoustic ray models


  1. Purcell, A,
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN);Purcell (Anthony) Consultants, Lunenburg NS (CAN)
This report is an annotated bibliography of ray theory approaches to the analysis of high frequency, shallow water propagation. Specifically, it is concerned with the calculation of the ray paths, travel times, arrival angles and coherent transmission losses for range-dependent velocity profile, variable bathymetry, and shallow water environments. The wto approaches considered are the classic ray theory and the Gaussian beam method. The software developed in this report to evaluate the feasibility of applying these models to range-dependent environments is based on the numerical solution of the differential ray equations rather than analytic solutions of the ray paths for special cases. The ocean surface is assumed to be a flat pressure-release surface; the ocean bottom is a rigid, arbitrary bathymetry surface. The number of allowed surface or bottom bounces is adjustable and arbitrary. All parameters have cylindrical symmetry so there is propagation only in the same plane. The specific cases considered are the Gordon and Pedersen profile, the Munk profile, and a range-dependent, variable bathymetry, shallow water environment referred to as Scenario 5.

Il y a un résumé en français ici.

Ray theory;Travel time;Range dependant modelling;Variable bathymetry;Gaussian beam method;Mathematica;Munk profile;Gordon and Pedersen profile
Report Number
DREA-CR-2001-136 — Contractor Report
Date of publication
01 Sep 2001
Number of Pages
Hardcopy;Document Image stored on Optical Disk

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