用简单后向散射模型研究致密介质效应

遥感信息 Pub Date : 1997-08-03 DOI:10.1109/IGARSS.1997.606467

H. Ewe, H. Chuah

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引用次数: 4

摘要

在电密集的介质中，当散射体之间的间距与波长相当时，将近场效应(振幅和相位)纳入后向散射理论是很重要的。本文提出了一种基于辐射传递理论的简单后向散射理论。随机介质的上下被粗糙的表面包围，包含一层随机分布的球形散射体。利用密集介质相位和振幅修正理论(DM-PACT)获得了这些紧密排列的离散散射体的相位矩阵，并用IEM模型对粗糙表面进行了表征。将辐射传递理论的积分微分方程迭代求解至二阶解。确定了直接表面、直接体积、表面-体积和体积-体积相互作用的散射项。这些结果与使用矩阵加倍法的全模型解进行了比较。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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A study of dense medium effect using a simple backscattering model

In an electrically dense medium, when the spacing between the scatterers is comparable to the wavelength, it is important to incorporate the near field effect, both amplitude and phase, into the backscattering theory. In this paper, a simple backscatter theory based on radiative transfer (RT) theory is presented. The random medium, bounded on top and bottom by a rough surface, contains a layer of randomly distributed spherical scatterers. The phase matrix for these closely packed discrete scatterers is obtained using the dense medium phase and amplitude correction theory (DM-PACT) and the rough surface is characterized by the IEM model. The integro-differential equations of radiative transfer theory are solved iteratively up to second order solutions. Scattering terms for direct surface, direct volume, surface-volume and volume-volume interactions are identified. These results are compared with full model solutions using the matrix doubling method.

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来源期刊

遥感信息

自引率

0.00%

发文量

3984

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