Analysis of Crosstalk Impact on the Cloude-decomposition-based Scattering Characteristic
Hu Dingsheng①②③ Qiu Xiaolan①②* Lei Bin①② Xu Feng④⑤
①(Institute of Electronics, Chinese Academy of Science, Beijing 100190, China) ②(Key Laboratory of Technology in Geo-spatial Information Processing and Application System, Beijing 100190, China) ③(University of Chinese Academy of Science, Beijing 100049, China) ④(National Disaster Reduction Center of China, MCA, Beijing 100124, China) ⑤(Satellite Disaster Reduction Application Center, MCA, Beijing 100124, China)
Crosstalk is not only one of the main error sources in the polarimetric SAR system, but is also an indicator for evaluating calibration performance. In this paper, to determine the impact of crosstalk on land cover classification, we first retrieve the mathematical relation expressions between crosstalk and the Cloude-decomposition-based scattering characteristic. Then, we verify our theoretical conclusions in a semi-physical simulation based on Radarsat-2 polarimetric data for different land covers. Finally, we perform H/α/Wishart classification on the experimental data. From the ratio curve of pixels labeled differently under changing crosstalk, we can determine the crosstalk requirement that will meet the needs of specific applications.
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2017, Vol. 6 
