RADARSAT-2 Quad-pol SAR data preprocessing workflow in SNAP

RADARSAT-2 images are acquired in SLC format. The full-polarimetric images are multi-looked (in the range and azimuth) to generate the coherency matrix T. At first calibration is performed with a complex format output option. Then the 3x3 coherency matrix T is generated, following multi-looking and polarimetric speckle filtering. Finally, the despeckled product is terrain corrected and exported in a PolSARpro format (.bin and .hrd files). This product is further utilized to form the Generalized Radar Vegetation Index (GRVI). The .xml file includes the XML codes for the preprocessing workflow and to be performed in SNAP.RADARSAT-2 影像采用单视复数（Single Look Complex, SLC）格式获取。预处理流程如下：首先以复数格式输出选项完成影像校准；随后对全极化影像进行距离向与方位向多视处理，并结合极化斑点滤波，生成3×3相干矩阵T；最终将去斑后的产品进行地形校正，并导出为PolSARpro格式（包含.bin与.hrd两类文件）。该产品可进一步用于构建广义雷达植被指数（Generalized Radar Vegetation Index, GRVI）。配套的.xml文件包含该预处理工作流的XML代码，可在SNAP软件中执行。