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NUMERICAL-SIMULATION OF SCATTERING FROM 3-DIMENSIONAL RANDOMLY ROUGH SURFACES

被引：72
|
作者：
FUNG, AK
SHAH, MR
TJUATJA, S
机构：
[1] Wave Scattering Research Center, Department of Electrical Engineering, University of Texas at Arlington, Arlington, TX
[2] Department of Electrical Engineering, University of Texas at Arlington, Arlington, Fort Worth, TX 76019, Applied Telecom Ltd., TX.
来源：
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING | 1994年 / 32卷 / 05期
基金：
美国国家航空航天局;
关键词：
D O I：
10.1109/36.312887
中图分类号：
P3 [地球物理学]; P59 [地球化学];
学科分类号：
0708 ; 070902 ;
摘要：
Randomly rough surface patches in three dimensions are generated on the computer. The FD-TD method is used to compute scattering from surface patches by converting the Maxwell's equations into difference equations using a central difference approximation for the space and time derivatives. The volume of grids above the rough surface is divided into the total field and the scattered field regions. In between these two regions, obliquely incident waves are generated. To reduce computation, the volume of grids is chosen to be small, and a transformation is used to convert the scattered field into far zone fields for bistatic scattering coefficient calculations. Possible errors near the edge of the surface due to the use of a relatively small volume are suppressed by introducing a windowing function. Very good agreements are obtained between the results obtained by this method and those calculated by an Integral Equation Method (IEM) for scattering from randomly rough perfectly conducting and dielectric surfaces.
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页码：986 / 994
页数：9
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