Fresnel Double Scattering From Tree Branches
Fresnel Double Scattering From Tree Branches
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DOI：
10.1109/tgrs.2012.2186583
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发表时间：
2012-10-01
影响因子：
8.2
通讯作者：
Lang, Roger H.
中科院分区：
文献类型：
--
作者：
Zhao, Qianyi;Lang, Roger H.
本文提出了一种菲涅耳双散射（FDS）方法，用于精确、高效地计算L波段两个不一定在远场的树枝的散射截面。被建模为电介质圆柱体的分支被假设为具有与一个或多个波长相当的长度。它表明，FDS方法提供了一个很好的近似的精确解的两个分支建模为一个散射体。FDS方法可用于研究微波森林散射模型中树枝间的双散射效应，并可精确地模拟单散射和双散射是唯一重要散射机制的树木。
A Fresnel double scattering (FDS) method is presented in this paper to accurately and efficiently calculate the scattering cross section from two tree branches not necessarily in the far field of each other at L-band frequencies. The branches, modeled as dielectric cylinders, are assumed to have lengths comparable to one or more wavelengths. It is demonstrated that the FDS method provides a good approximation to the exact solutions of two branches modeled as one scatterer. The FDS method can be employed to study the double scattering effects between tree branches in microwave forest scattering models and accurately model a tree where single scatter and double scatter are the only important scattering mechanisms.