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Simulation of Microwave Backscattering from Sea Surface Using an Improved Two-Scale Model

机译：利用改进的两尺度模型仿真海面从海面散射

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The two-scale model (TSM) has been frequently used in the study of EM (electromagnetic) scattering from rough surface due to its simple and practical merit. However, for microwave scattering from sea surface, it cannot provide accurate predictions for $hh$ (horizontal) polarization. To overcome this problem, an improved version of the TSM (ITSM) which can be better used for predicting microwave scattering from sea surface is proposed in this paper. In the ITSM, we propose to use two cutoff parameters to separate sea surface roughness. For $k_{w} < k_{cs}$, the KA-SP (Kirchhoff approximation-stationary phase approximation) rather than KA-GO (Kirchhoff approximation-geometric optics approximation) is employed to simulate the specular scattering component. For $k_{w} > k_{cb}$, the SPM modulated by tilts of large-scale waves is employed to simulate the Bragg scattering component. The values of $k_{cs}$ and $k_{cb}$ are chosen according to the validity conditions of the KA and the SPM. The numerical comparisons illustrate that the ITSM performs better than the TSM and the SSA-1, especially in the prediction of $hh$ polarized scattering coefficient.
机译：由于其简单实用的优点，两种规模模型（TSM）经常用于从粗糙表面散射的EM（电磁）散射。然而，对于从海面散射的微波炉，它不能提供准确的预测 $ hh $ （水平）极化。为了克服这个问题，本文提出了可以更好地用于预测海面微波散射的TSM（ITSM）的改进版本。在ITSM中，我们建议使用两个截止参数来分离海面粗糙度。为了 $ k_ {w} ，采用KA-SP（Kirchhoff近似静止相位近似）而不是Ka-Go（Kirchhoff近似 - 几何光学近似）来模拟镜面散射分量。为了 $ k_ {w}> k_ {CB} $ ，采用大规模波的倾斜调制的SPM来模拟布拉格散射部件。价值 $ k_ {cs} $ < / tex> 和 $ k_ {cb} $ < / tex> 根据KA和SPM的有效条件选择。数值比较示出了ITSM比TSM和SSA-1更好地执行，尤其是在预测中 $ hh $ 偏振散射系数。

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