Consideration on singular-point generating mechanisms by analyzing the effect of phase-and-polarization optimization in PolInSAR
Consideration on singular-point generating mechanisms by analyzing the effect of phase-and-polarization optimization in PolInSAR
复制标题
通过分析PolInSAR相位和偏振优化的效果思考奇点生成机制
DOI：
10.1109/jstars.2020.2983801
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发表时间：
2020
影响因子：
5.5
通讯作者：
Y.Otsuka T.Shimada R.Natsuaki A.Hirose
中科院分区：
文献类型：
--
作者：
Wang Dong;Ueda Yuki;Kula Raula Gaikovina;Ishio Takashi;Matsumoto Kenichi;Y.Otsuka T.Shimada R.Natsuaki A.Hirose
通过研究极化干涉合成孔径雷达（PolInSAR）中相位畸变与极化状态变化之间的关系，阐明了奇异点的产生机理。我们发现，在泡利相干矩阵中的参数和通过最大化干涉相干性优化的散射机制向量中的参数之间存在高度相关性。这意味着偏振参数与相位补偿参数之间存在相关性。换句话说，相位和偏振的主要变化是由同一现象引起的，即散射本身。因此，我们可以利用偏振参数来降低SP。我们还发现，引起相位变化的其他来源是来自多个散射源的波的干涉和热噪声。最后，我们研究如何优化补偿偏振变化，通过引入散射球表示。我们发现，优化减少了随机性的极化功能，并提高了特定的确定性散射，如表面和双反弹散射的功能。这意味着概率/随机散射是SP产生的主要来源。
We elucidate the generation mechanisms of singular points (SPs) by investigating the relationship between the phase distortion and the polarization-state changes in polarimetric interferometric synthetic aperture radar (PolInSAR). We find that there is a high correlation between the parameters in the Pauli coherency matrix and those in the scattering mechanism vector optimized by the maximization of interferometric coherence. It means that there is a correlation between the parameters of polarization and those of the phase compensation. In other words, the main changes in phase and those in polarization are caused by an identical phenomenon, that is, scattering itself. Therefore, we can use the parameters of polarization to reduce SPs. We also find that other origins that cause the changes in phase are the interference of waves from multiple scattering sources and thermal noise. Lastly, we investigate how the optimization compensates polarization changes by introducing the scattering sphere representation. We find that the optimization reduces randomness in the polarimetric features, and enhances the features specific to deterministic scattering such as surface and double-bounce scattering. It means that probabilistic/random scattering is the main origin of SP generation.