Modeling and observation of the radar polarization signature of forested areas
Modeling and observation of the radar polarization signature of forested areas
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DOI：
10.1109/36.17670
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发表时间：
1989-05
影响因子：
8.2
通讯作者：
S. Durden;J. V. Zyl;H. Zebker
中科院分区：
文献类型：
--
作者：
S. Durden;J. V. Zyl;H. Zebker
为了了解森林地区的雷达测量，作者开发了一个来自森林的l波段（25厘米）微波散射模型。森林地面是一层几乎垂直的介质圆柱体，代表树干。在这一层之上是第二层，由随机方向的圆柱体组成，代表树枝。作者确定了几种散射机制，并计算了相应的Stokes矩阵，并将它们结合起来给出了总Stokes矩阵和由此产生的偏振特征。研究发现，这个简单的模型可以准确地预测散射波的偏振，并且对于所研究的森林的25厘米观测，不需要额外的机制，包括树叶和树枝的影响。作者介绍了在森林地区获得的偏振特征的测量结果，并与模型计算结果进行了比较。>
To understand radar measurements of forested areas, the authors have developed a model of L-band (25-cm) microwave scattering from a forest. The forest floor is layer of nearly vertical dielectric cylinders representing tree trunks Above this layer is a second layer consisting of randomly oriented cylinders which represent branches. The authors identify several scattering mechanisms and calculate the corresponding Stokes matrices, which combine to give the total Stokes matrix and resulting polarization signature. It is found that this simple model permits accurate prediction of the polarization of the scattered waves and that additional mechanisms, including the effects of leaves and twigs, are not required for the 25-cm observation of the forests studied. The authors present measurements of the polarization signature acquired over a forested area and show comparisons with model calculations. >