Study on Error Analysis of Geometric Distortion Correction and Compensation Techniques for Circular-Scan SAR
环视SAR几何失真校正误差分析及补偿技术研究

Circular-Scan SAR is mainly used for scene matching in the precision-guided missiles, where geometry accuracy is very important. However, due to errors introduced by the GPS/IMU, it remains somewhat geometric distortion after geometric distortion correction based on the GPS/IMU data. This paper analyzes the impact of the error of scan angle and aircraft height and aircraft velocity on the image quality. Meanwhile, approaches to correcting these errors based on measured data are presented. Experiments carried out on measured data confirm the validity of the analysis and the feasibility of the compensation scheme.