Low Frequency Resonance Backscatter From Near-Surface Bubble Clouds

Abstract

When active sonar systems are used to insonate the sea surface, anomalous scattering is observed in the form of enhanced backscatter, and more importantly, in the form of discrete, bright echoes. The most plausible explanation for these effects is the increased scattering resulting from the presence of bubble plumes and clouds, produced near the surface by breaking waves. This paper describes some preliminary calculations of the back scattered target strengths expected on the basis of resonance scattering from bubble clouds.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1994
Accession Number
AD1114339

Entities

People

  • Jeffrey A. Schindall
  • L. A. Crum
  • R. A. Ray
  • W. M. Carey

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Acoustic Scattering
  • Acoustics
  • Active Sonar
  • Ambient Noise
  • Backscattering
  • Equations
  • False Targets
  • Free Field
  • Frequency
  • Grazing Angles
  • Measurement
  • Physics Laboratories
  • Plane Waves
  • Resonance Scattering
  • Scattering
  • Surface Properties
  • Target Strength

Fields of Study

  • Physics

Readers

  • Acoustical Oceanography.
  • Atmospheric Remote Sensing.
  • Theoretical Analysis.