The $2\times 2$ relative scattering matrix $[S]$ is characterized by five elements (three amplitudes and two relative phases). A more suitable representation of the data in terms of power expression for target identification exists in the $3\times 3$ Pauli-based polarimetric coherency matrix $[T]$ . The aim of this work is to expand the physical interpretation of $[T]$ elements in terms of a physical scattering mechanism, which has not yet been achieved completely. Compound scattering matrix nature is considered to interpret the elements of $[T]$ . Compound scattering phenomenon, and thereby generated matrices, are verified with measured compound scattering matrices in an anechoic chamber by comparing measured and theoretical polarization signature responses. The behavior of measured polarization signature(s) is consistent with the theoretical/hypothetical polarization signature(s). It is also observed that the combination of two or more dipole-type targets formed the scattering generators and helped to reveal the unknown scattering mechanisms in the coherency matrix. Furthermore, the existence of compound scattering phenomenon is also justified with airborne and spaceborne fully polarimetric synthetic aperture radar (POLSAR) data by implementing recent physical model-based scattering power decomposition methods.

中文翻译：

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基于复合散射现象的POLSAR相干矩阵的物理散射解释

这 $2\乘以 2$ 相对散射矩阵 $[S]$ 由五个元素（三个幅度和两个相对相位）表征。在目标识别的功率表达式方面，数据的更合适表示存在于 $3\times 3$ 基于泡利的极化相干矩阵 $[T]$ . 这项工作的目的是扩大物理解释 $[T]$ 元素在物理散射机制方面，尚未完全实现。复合散射矩阵性质被认为是解释元素 $[T]$ . 通过比较测量的和理论的偏振特征响应，在消声室中用测量的复合散射矩阵验证复合散射现象，从而生成的矩阵。测量的偏振特征的行为与理论/假设的偏振特征一致。还观察到，两个或多个偶极型目标的组合形成了散射发生器，并有助于揭示相干矩阵中未知的散射机制。此外，通过实施最新的基于物理模型的散射功率分解方法，机载和星载全极化合成孔径雷达 (POLSAR) 数据也证明了复合散射现象的存在是合理的。