Accession Number : ADA322019

Title :   Bottom Grain Gas and Roughness Technique (BOGGART) Version 3.0: Bottom Backscatter Model User's Guide.

Descriptive Note : Technical rept.,

Corporate Author : TEXAS UNIV AT AUSTIN APPLIED RESEARCH LABS

Personal Author(s) : Boyle, Frank A. ; Chotiros, Nicholas P.

PDF Url : ADA322019

Report Date : 04 JUN 1996

Pagination or Media Count : 46

Abstract : A user's guide has been developed for BOGGART, a model for acoustic backscatter from marine sediments, developed at Applied Research Laboratories, The University of Texas at Austin (ARL:UT), with support from the Naval Research Laboratory at Stennis Space Center (NRL/SSC). The model, named for bottom grain gas and roughness technique, computes the total backscattering strength as an incoherent sum of contributions from three components. They are (1) scattering from sediment grains, (2) scattering from trapped gas bubbles within the sediment, and (3) scattering from interface roughness. The grain scattering is modeled semiempirically, based on the diffusion equation, in lieu of using a theoretical model which is under development. The gas bubble and roughness-scattering components are theoretical. Acoustic propagation in the sediment is modeled by way of the Biot theory for poroelastic media. This report is a user's description for BOGGART, version 3.0.

Descriptors :   *ACOUSTIC SCATTERING, *SEDIMENTS, *OCEAN BOTTOM SOILS, USER MANUALS, SURFACE ROUGHNESS, SAND, BACKSCATTERING, GAS DYNAMICS, BUBBLES, SOUND TRANSMISSION, UNDERWATER ACOUSTICS, POROUS MATERIALS.

Subject Categories : Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE