Three-dimensional imaging of terrain by polarimetiric interferometric synthetic aperture radar

这项研究的目的是利用极化和干涉合成孔径雷达数据对地形进行三维成像。这种极化干涉数据采集要求机载雷达在几厘米重复飞行范围内进行非常精确的测量。由于这种情况在实际飞机上很难实现，所以我们主要研究极化合成孔径雷达数据的分类和分解。雷达遥感的最终目的是根据极化信息发现目标的细节。因此，在此期间进行的研究成果如下：1.建立雷达极化原理建立一个统一的极化雷达传感理论是非常重要的。介绍了雷达极化测量的基本原理及其应用。2.X波段极化合成孔径雷达系统的建立(1)在电波暗室中建立极化干涉合成孔径雷达。(2)从极化角度对采集的数据进行验证。3.目标分类的发展(1)在二阶互相关统计量、特征值、极化基变换等统计量中寻找极化信息的最佳描述子。(2)建立极化合成孔径雷达图像分解的四分量散射模型。(3)利用PI-SAR获取的Niigata地区的PI-SAR数据进行四分量分解。

The purpose of this research was a three-dimensional imaging of terrain using polarimetric and interferometric synthetic aperture radar data. This polarimetric interferometric data-take requires very precise measurement for airborne radar within several cm repeat pass flight. Since this condition was too difficult to achieve for actual airplane, we paid main attention to classification and decomposition of polarimetric SAR data. The final purpose of radar remote sensing would be to find the details of target based on the polarimetric information. Thus, the research results conducted during the period are :1.Establishment of the principle of radar polarimetryIt is important to establish a unified theory for polarimetric radar sensing. The principle of radar polarimetry from basic to its applications has been described in the research report.2.Establishment of X-band polarimetric SAR system(1)Set-up of polarimetric interferometric SAR in anechoic chamber.(2)Validation of acquired data from polarimetric point of view.3.Development of target classification(1)Search for best descriptor of polarimetric information among the statistics of the second order of cross-correlations, eigenvalue, polarization basis transformation, etc.(2)Development of four-component scattering model for polarimetric SAR image decomposition.(3)Ground truth for the four-component decomposition using Pi-SAR data acquired with Pi-SAR over Niigata area.