Sound Speed Profiles from Vertical Array Data

Abstract

A scheme for extracting sound speed information from vertical arrays in shallow water is examined. The scheme hinges on the covariance matrix of the pressures received at the array being diagonal in the modes of the water column, and involves computing second derivatives of the covariance. Conditions under which the covariance might be mode-diagonal are examined. It is found that without attenuation, it is unlikely to find mode-diagonal covariances. However with reasonable attenuations, the covariance will be dominated by the lowest mode. The scheme described here is applied to vertical array data taken in 1985.

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Document Details

Document Type
Technical Report
Publication Date
Jun 08, 1993
Accession Number
ADA267300

Entities

People

  • David H. Berman

Organizations

  • University of Iowa

Tags

Communities of Interest

  • Air Platforms
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Attenuation
  • Covariance
  • Data Sets
  • Doppler Effect
  • Eigenvalues
  • Eigenvectors
  • Experimental Data
  • Extraction
  • Frequency
  • Frequency Bands
  • Group Velocity
  • Hydrophones
  • Measurement
  • Phase Velocity
  • Roughness
  • Shallow Water
  • Surface Roughness

Readers

  • Acoustical Oceanography.
  • Linear Algebra