Numerical Studies of Low Grazing Angle Microwave Scattering from Breaking Water Waves

Abstract

The microwave backscattering from breaking water waves at small illumination Grazing angles (LGA) has been investigated using computational electromagnetics (CEM) techniques. Good agreement is achieved between the numerically calculated and experimentally measured backscattering from a wave tank plunging breaker. The large measured HH/VV polarization ratio is due to the shape of the wave crest and the multi-path scattering from the wave crest and front face. The HH/W ratio is maintained when the wave crest has modified nonuniformities in azimuth, although it is affected by larger variations. The two-scale model fails to predict the LGA scattering from a 3-D gently spilling breaker even after the steepest wave features have been removed.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2005
Accession Number
ADA432042

Entities

People

  • James C West

Organizations

  • Oklahoma State University–Stillwater

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Agreements
  • Backscattering
  • Computational Science
  • Diffraction
  • Doppler Effect
  • Electromagnetic Scattering
  • Geometry
  • Grazing
  • Grazing Angles
  • Microwaves
  • Models
  • Scale Models
  • Scattering
  • Three Dimensional
  • Two Dimensional
  • Water Waves
  • Waves

Fields of Study

  • Physics

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Electromagnetic Wave Scattering and Antenna Radiation Engineering