Accession Number:

AD1113465

Title:

Broadband Geo-Acoustic Inversion from Sparse Data Using Genetic Algorithms: Results from the 1997 Geo-Acoustic Inversion Workshop

Descriptive Note:

[Technical Report, Memorandum Report]

Corporate Author:

SACLANT UNDERSEA RESEARCH CENTRE LA SPEZIA (ITALY)

Personal Author(s):

Report Date:

1998-03-01

Pagination or Media Count:

32

Abstract:

Matched field acoustic inversion techniques were investigated using data from sparsely populated, vertical receiving arrays and a single receiver element. The purpose of considering sparse data sets is to investigate, by simulation, the feasibility of reducing the number and complexity of acoustic measurements needed for geo-acoustic inversion. The entire bandwidth of the1997 G-Acoustic Inversion Workshop data 25-500 Hz was used to compensates for the lack of spatial information when a limited number of receivers is considered. Forward model PROSIM and inversion code SAGA were applied to benchmark cases sd , wa, and n. The inversion results generally showed good agreement with the ground truth, for full arrays, sparse arrays and single receiver elements. With a simple two layer model, an effective sound speed profile in the bottom was determined, which produced a good fit between model and observed pressure fields for the multi-layer case n.

Subject Categories:

  • Acoustics
  • Theoretical Mathematics

Distribution Statement:

[A, Approved For Public Release]