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

Abstract

A concept for rapid environmental characterization of the sea bottom/subbottom has been successfully tested during the LWAD9S-2 seatest. As a proof-of-concept test, inversion of statistical parameters of a Jackson/Turgut 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.

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Document Details

Document Type
Technical Report
Publication Date
Apr 12, 1999
Accession Number
ADA361913

Entities

People

  • Altan Turgut

Organizations

  • United States Naval Research Laboratory

Tags

DTIC Thesaurus Topics

  • Acoustics
  • Attenuation
  • Backscattering
  • Data Analysis
  • Engineering
  • Filtration
  • Frequency
  • Frequency Bands
  • Frequency Shift
  • Grazing Angles
  • Inversion
  • Measurement
  • Military Research
  • Reflection
  • Scattering
  • Seabed
  • Wave Propagation

Readers

  • Acoustical Oceanography.
  • Software Engineering