Statistical properties of the Mueller matrix of distributed targets. [measured in backscattering direction by polarimetric radar system]
Statistical properties of the Mueller matrix of distributed targets. [measured in backscattering direction by polarimetric radar system]
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DOI：
10.1049/ip-f-2.1992.0017
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发表时间：
1992-04
期刊：
影响因子：
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通讯作者：
F. Ulaby;K. Sarabandi;A. Nashashibi
中科院分区：
文献类型：
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作者：
F. Ulaby;K. Sarabandi;A. Nashashibi
由极化雷达系统在后向散射方向上测量的散射矩阵由五个量组成：mod S/sub vv/ mod、mod S/sub hh/ mod和mod S/sub hv/ mod，它们是线性极化散射幅度的幅度，以及phi /sub c/和phi /sub x/，它们是共极化和交叉极化相位角。共极化相位角φ/sub c/被示出为呈现完全由两个参数α和ζ表征的概率密度函数（PDF），这两个参数α和ζ都与目标的Mueller矩阵的元素有关。参数alpha控制PDF的宽度，zeta控制phi /sub c/的平均值。它进一步表明，三个幅度mod S/sub vv/ mod，mod S/sub hh/ mod，和mod S/sub hv/ mod和两个参数alpha和zeta完全指定的米勒矩阵，因此包含所有的统计信息可从极化后向散射响应的目标。这些结果与实验观测结果进行了验证，表明α和ζ与土壤和植被目标的物理和介电特性有关。
The scattering matrix measured in the backscattering direction by a polarimetric radar system consists of five quantities: mod S/sub vv/ mod , mod S/sub hh/ mod , and mod S/sub hv/ mod , which are the magnitudes of the linearly polarised scattering amplitudes, and phi /sub c/ and phi /sub x/, which are the co-polarised and crosspolarised phase angles. The co-polarised phase angle phi /sub c/ is shown to exhibit a probability density function (PDF) that is characterised completely by two parameters alpha and zeta , both of which are related to the elements of the Mueller matrix of the target. The parameter alpha governs the width of the PDF and zeta governs the mean value of phi /sub c/. It is further shown that the three magnitudes mod S/sub vv/ mod , mod S/sub hh/ mod , and mod S/sub hv/ mod and the two parameters alpha and zeta completely specify the Mueller matrix, and therefore contain all the statistical information available from the polarimetric backscatter response of the target. These results are verified with experimental observations that show that alpha and zeta are related to the physical and dielectric properties of soil and vegetation targets.