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Scattering And Absorption of Light in Planetary Regoliths
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Deterministic forward scatter from surface gravity waves.

Grant B Deane1, James C Preisig, Chris T Tindle

  • 1Scripps Institution of Oceanography, University of California-San Diego, La Jolla, California 92093-0238, USA. gdeane@ucsd.edu

The Journal of the Acoustical Society of America
|December 13, 2012
PubMed
Summary
This summary is machine-generated.

Sound reflections from gravity waves create predictable patterns affecting underwater acoustics. This study confirms these deterministic effects in shallow waters, improving sonar and communication system performance.

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Area of Science:

  • Underwater acoustics
  • Oceanography
  • Wave propagation

Background:

  • Gravity waves on water surfaces create complex sound scattering patterns.
  • Deterministic structures like focused arrivals and Doppler shifts impact sonar and underwater communication systems.

Purpose of the Study:

  • To analyze deterministic sound scattering from surface gravity waves.
  • To validate acoustic models with shallow water measurements.

Main Methods:

  • Stationary phase analysis of the Helmholtz-Kirchhoff scattering integral.
  • Shallow water acoustic measurements using upward-looking sonar.
  • Comparison of modeled and observed pulse arrival times and amplitudes.

Main Results:

  • Deterministic effects were observed in sound propagation up to 70 water depths.
  • Modeled and observed pulse arrival statistics showed good agreement.
  • Root mean square differences between modeled and observed data were 0.2 or less.

Conclusions:

  • The study confirms the predictability of sound scattering by surface gravity waves.
  • Findings enhance understanding for underwater acoustics, sonar, and communication systems.
  • Accurate modeling of surface wave effects is crucial for acoustic system performance.