Volume Scattering Measurements Using Parametric Sonar

Abstract

A parametric sonar has been used to measure volume scattering strength at a number of ocean locations. The narrow beamwidth and absence of sidelobes of the parametric sonar make it an ideal tool for measuring volume scattering strength as a function of depth and frequency. The resolution of this device is such that in some circumstances individual scatterers can be identified. An example of such a situation is presented. The parametric sonar system is described. Additional sets of examples from nearshore and off-shore areas are presented for both day and night conditions and for migration periods. (rh)

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Document Details

Document Type
Technical Report
Publication Date
Aug 17, 1988
Accession Number
ADA227874

Entities

People

  • Charles L. Brown Jr.
  • James M. Syck

Organizations

  • Naval Underwater Systems Center

Tags

Communities of Interest

  • Energy and Power Technologies
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Acoustic Beams
  • Classification
  • Deep Scattering Layers
  • Difference Frequency
  • Frequency
  • Hard Copy
  • Measurement
  • Migration
  • Oceans
  • Recording Systems
  • Scattering
  • Security
  • Sidelobes
  • Tape Recorders
  • Time Intervals
  • Tongue Of The Ocean
  • Transducers

Readers

  • Coastal Oceanography
  • Mathematics or Statistics
  • Phased Array Antenna Design.