Pacific Marine Radar Sea Scatter Experimental Results
Results are presented for a low grazing angle marine radar sea scatter experiment conducted in the Pacific Ocean. A wide range of wind speeds and directions resulted in non-equilibrium sea conditions, in contrast to a previous Atlantic experiment in which ocean waves were fully developed. Statistica...
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Format: | Text |
Language: | English |
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1989
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Online Access: | http://www.dtic.mil/docs/citations/ADA211593 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA211593 |
Summary: | Results are presented for a low grazing angle marine radar sea scatter experiment conducted in the Pacific Ocean. A wide range of wind speeds and directions resulted in non-equilibrium sea conditions, in contrast to a previous Atlantic experiment in which ocean waves were fully developed. Statistical properties of the radar echoes are parameterized by a dual-Weibull model versus wind speed and differ from the North Atlantic data. A modified version of Wetzel's cylindrical plume scattering model satisfactorily describes the sea spike cross section characteristics. For the Weibull distribution representing distributed scatter, a composite scattering model produces neither the correct absolute cross section nor the correct X/S band ratio using Bragg scatter spectral densities derived from high grazing angle radar experiments. Thus, the surface turbulence from a broken crest on the front face of waves may be responsible for the scatter from area-distributed roughness. |
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