Accession Number:

ADA629287

Title:

Tomographic Inversion for Geoacoustic Parameters

Descriptive Note:

Corporate Author:

ATOLSTOY SCIENCES ANNANDALE VA

Personal Author(s):

Report Date:

1999-09-30

Pagination or Media Count:

7.0

Abstract:

LONG TERM GOAL. The tomographic geoacoustic inversion method is intended for the eventual real-time estimation of range, depth, and azimuthally varying shallow water bottom properties by means of simple, rapidly deployed, broadband sources plus a few rapidly deployed receiver arrays. The computed environmental properties would then be available as input parameters to fleet acoustic propagation models used for the detection of targets, e.g., subs or mines. OBJECTIVES. The objective of this approach is to efficiently and rapidly estimate those geoacoustic environmental parameters to which acoustic fields are sensitive. Such environmental parameters include number of sediment layers, sediment thicknesses, attenuations, densities, and sound-speed profiles, as a function of 3-D range, depth, and azimuth. The intent is to replace present requirements for extensive environmental sampling which can be extremely time-consuming and expensive with intense computational processing of multiple array plus multiple broadband source data.

Subject Categories:

  • Geology, Geochemistry and Mineralogy
  • Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE