Study on Ground Control Point Locating Strategy for Airborne Along-track Interferometric SAR
Zhang Hui①②③ Hong Jun① Wang Yu① Li Ji-chuan①②
① (Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China) ②(University of Chinese Academy of Sciences, Beijing 100049, China) ③(Key Laboratory of Technology in Geo-spatial Information Processing and Application System, Beijing 100190, China)
The accuracy of the radial velocity estimated by the airborne Along-Track Interferometric SAR (ATI-SAR) is affected by the accuracy of different system parameter, such as the interferometric phase biases and the baseline components errors. Therefore, these factors must be calibrated if the higher radial velocity estimation accuracy is required. The calibration methods based on the sensitivity equations are generally used in the interferometric SAR calibration. However, the performance of these methods is limited by the matrix condition number of the sensitivity matrix, which is decided by the location strategy of Ground Control Points (GCP). This study analyses and simulates the condition number of the sensitivity matrix corresponding to the different GCP distribution ways along the swath as well as the different selections of velocities and positions of moving ground control points.
张慧,洪峻,王宇,李纪传. 机载顺轨干涉合成孔径雷达定标中地面控制点的布设策略研究[J]. 电子与信息学报, 2015, 37(7): 1716-1722.
Zhang Hui, Hong Jun, Wang Yu, Li Ji-chuan. Study on Ground Control Point Locating Strategy for Airborne Along-track Interferometric SAR. JEIT, 2015, 37(7): 1716-1722.
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