A Parametric Synthetic Aperture Sonar for Detection of Proud and Buried Mines

Abstract

This paper describes an experimental comparison between a parametric sonar and a conventional sonar for the detection of small objects on and in, the seabed. Two experiments were performed in France (GESMA site) in October 95 and March 96 in order to assess the feasibility of detecting buried mines using a parametric sonar configured as a sidescan sonar working at very low grazing angles(well below the critical angle) where the Snell theory restricts any bottom type 2 penetration of the sound into the sediment. There is however substantial evidence of penetration below the critical grazing angle which may be explained by different theories (such as for example bottom roughness, evanescent waves, Biot waves, Narrow beam-width).

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1997
Accession Number
AD1113605

Entities

People

  • A. Lovik
  • A. Maguer
  • S. Fioravanti

Tags

Communities of Interest

  • Air Platforms
  • C4I
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Acoustics
  • Ambient Noise
  • Bandwidth
  • Beam Steering
  • Buried Objects
  • Detection
  • Difference Frequency
  • Doppler Effect
  • Frequency
  • Frequency Shift
  • Grazing Angles
  • Nato
  • Physical Theories
  • Scattering
  • Sonar
  • Synthetic Aperture Sonar
  • Target Strength

Readers

  • Acoustical Oceanography.
  • Theoretical Analysis.