A Theoretical Model for Doppler Spread of Backscattered Sound From a Composite Roughness Sea Surface

Abstract

For calculating the Doppler spread of acoustical reverberation from the sea surface, good results are achieved by applying a composite-roughness model. The small wavelets primarily responsible for the backscattering are carried by long waves with higher amplitudes. Small roughness results are applied to conceptual "facets" on the long waves. As coupling parameters between short and long-wave scattering, the rms-slope, the rms-vertical and horizontal velocities of the facets and their cross-correlation coefficients are used. They are calculated from the covariance function of the sea surface as a function of the facet length. For a Pierson-Moscowitz spectrum, some computer results are given.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1975
Accession Number
AD1114333

Entities

People

  • H. Schwarze

Organizations

  • SACLANT ASW Research Centre

Tags

Communities of Interest

  • Air Platforms
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Acoustic Frequencies
  • Acoustic Scattering
  • Acoustic Waves
  • Backscattering
  • Composite Materials
  • Computers
  • Cross Correlation
  • Data Science
  • Dispersion Relations
  • Doppler Effect
  • Frequency
  • Gaussian Processes
  • Grazing Angles
  • Information Science
  • Normal Distribution
  • Roughness
  • Scattering
  • Sound Pressure
  • Statistics
  • Stochastic Processes
  • Surface Roughness
  • Surface Waves
  • Waves

Fields of Study

  • Physics

Readers

  • Acoustical Oceanography.
  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Computational Modeling and Simulation