Accession Number:

ADA052890

Title:

Extensions of the Parabolic Equation Model for High-Angle Bottom-Interacting Paths,

Descriptive Note:

Corporate Author:

SCIENCE APPLICATIONS INC MCLEAN VA

Personal Author(s):

Report Date:

1977-12-31

Pagination or Media Count:

27.0

Abstract:

Hence the specific problem of interest is the propagation of high angles over large distances where the energy is refracted in the ocean-bottom sediments rather than reflected from a hard interface. The principal difficulty with PE in such geometries is that a steep angle effectively propagates with the period of a shallower angle since the horizontal component of its phase velocity is less than it should be. Hence the ray period, or cycle distance, is too large. For water-borne paths this problem was largely removed by CMOD. The relaxation of the CMOD convergence-zone constraint permits certain liberties to be taken with the sound-speed profile in the bottom which could not be considered in the water column.

Subject Categories:

  • Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE