Bistatic scattering coefficient from one- and two-dimensional random surfaces using the stationary phase and scalar approximation with shadowing effect: comparisons with experiments and application to the sea surface
Bistatic scattering coefficient from one- and two-dimensional random surfaces using the stationary phase and scalar approximation with shadowing effect: comparisons with experiments and application to the sea surface
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DOI：
10.1088/0959-7174/11/2/303
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发表时间：
2001-04
期刊：
影响因子：
--
通讯作者：
C. Bourlier;G. Berginc;J. Saillard
中科院分区：
文献类型：
--
作者：
C. Bourlier;G. Berginc;J. Saillard
本文用驻相法和考虑遮挡效应的标量近似方法研究了一维和二维随机表面的双基地散射系数。这两种方法都使用基尔霍夫积分。在定相的情况下，双站截面由表面高度联合特征函数表示，研究了遮挡效应。在标量近似的情况下，根据先前的特征函数和斜率积分的期望值来计算散射函数，其中分析了阴影效应。将这两个公式与从高斯一维随机粗糙的理想导电表面获得的实验数据进行了比较。利用定相方法，将计算结果应用于二维海面。
Abstract In this paper, the bistatic scattering coefficient from one- and two-dimensional random surfaces using the stationary phase method and scalar approximation with shadowing effect is investigated. Both of these approaches use the Kirchhoff integral. With the stationary phase, the bistatic cross section is formulated in terms of the surface height joint characteristic function where the shadowing effect is investigated. In the case of the scalar approximation, the scattering function is computed from the previous characteristic function and in terms of expected values for the integrations over the slopes, where the shadowing effect is analysed analytically. Both of these formulations are compared with experimental data obtained from a Gaussian one-dimensional randomly rough perfectly-conducting surface. With the stationary-phase method, the results are applied to a two-dimensional sea surface.