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PIER PIER B PIER C PIER M PIER Letters
2011-08-05
Investigation of Low-Grazing-Angle Microwave Backscattering from Threedimensional Breaking Sea Waves
By
Wei Luo,

    Dr. Wei Luo

    School of Science

    Xidian University

    China

    Homepage

Min Zhang,

    Prof. Min Zhang

    School of Science

    Xidian University

    China

    Homepage

Chao Wang,

    Dr. Chao Wang

    Science and Technology on Electromagnetic Scattering Laboratory

    China

    Homepage

Hong-Cheng Yin

    Prof. Hong-Cheng Yin

    National Electromagnetic Scattering Laboratory

    China

    Homepage

Progress In Electromagnetics Research, Vol. 119, 279-298, 2011
doi:10.2528/PIER11062607
Abstract
The microwave backscattering of the sea surface is investigated with the wedge-shaped breaking waves for the super events at low grazing angles (LGA). According to the relationship between the wave breaking and the whitecap, the finite three-dimensional wedges are utilized to approximately model the breaking waves, of which the spatial distribution is simulated with whitecap coverage. The phase-modified two-scale method (TSM) and method of equivalent currents (MEC) are used to calculate the surface and volume scattering of sea surface and breaking waves respectively. The sea spikes in LGA are observed by this model, and the strong directionality is caused by the breakers. Considering the Bragg phase velocity, orbital motion of facets and wind drift, the Doppler spectrum is simulated with the time series of sea clutter. Included the breaking waves, the scattering model indicates that the enhanced non-Bragg scattering leads to the extended Doppler spectrum width. The numerical results agree with the measured data well at LGA. Compared with the statistical models, the complex physical mechanism of the sea scattering is explicitly described in this paper.
Citation
Wei Luo, Min Zhang, Chao Wang, and Hong-Cheng Yin, "Investigation of Low-Grazing-Angle Microwave Backscattering from Threedimensional Breaking Sea Waves," Progress In Electromagnetics Research, Vol. 119, 279-298, 2011.
doi:10.2528/PIER11062607
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