An Improved Crosstalk Estimation Algorithm of Polarimetric and Interferometric Sar Calibration

Hong Zhang, Wuping Lu, Fan Wu, Chao Wang, Bo Zhang, Yixian Tang Center for Earth Observation and Digital Earth, CAS, No. 9 Dengzhuangnan Road, Haidian District, Beijing, 100094, China Email: [email protected] ABSTRACT It is necessary to calibrate SAR data in order to use the data for science applications. When both polarimetric and interferometric data are collected simultaneously, these SAR data can be used for cross-calibration and verification. In this paper, we propose an improved algorithm to estimate the parameters stable and accurately based on the Ainsworth and the Quegan algorithms. Since there is no approximate in the process of the parameters estimation, this algorithm can accurately solve all parameters, even if the crosstalk is high. To verify the effect of proposed calibration algorithm, this paper analyzes the accuracy of proposed algorithm with Chinese airborne X-band PolinSAR data. The results confirm the proposed algorithm can solve all parameters more stable and accurately.