Accession Number:

ADA361913

Title:

Rapid Geoacoustics Inversion Methods Used in LWAD98-2 Sea Test,

Descriptive Note:

Corporate Author:

NAVAL RESEARCH LAB WASHINGTON DC

Personal Author(s):

• Turgut, Altan

Report Date:

1999-04-12

Pagination or Media Count:

14.0

Abstract:

A concept for rapid environmental characterization of the sea bottomsubbottom has been successfully tested during the LWAD9S-2 seatest. As a proof-of-concept test, inversion of statistical parameters of a JacksonTurgut bottomisubbottom scattering model from backscatter data is performed. Seabed geoacoustic properties are also inverted from normal-incidence acoustic data. Results are in agreement with the previously reported geoacoustic data for the area. Iterative time-reversal techniques were also used to improve backscattered signal quality in an engineering trial. All the time-reversal hardware and software components functioned well except for the proper band-pass filtering of the received backscatter signal.

Descriptors:

• *BACKSCATTERING
• *GEOACOUSTICS
• *INVERSION
• *UNDERWATER ACOUSTICS
• COMPUTER PROGRAMS
• METHODOLOGY
• MODELS
• PARAMETERS
• STATISTICS
• QUALITY
• ENGINEERING
• SIGNALS
• OCEAN BOTTOM

Subject Categories:

• Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE