Extraction and Correction of SAR Amplitude and Phase Errors
Based on Internal Calibration Signal
Jiao Wei①②; Liang Xing-dong①; Ding Chi-biao①
①The Institute of Electronics, Chinese Academy of Sciences, Beijing 100080, China; ②Graduate School, Chinese Academy of Sciences, Beijing 100039, China
Abstract：Based on the design of three-path calibrator of SAR, this paper proposes one solution of obtaining system errors information from internal calibrator signal to correct the received SAR data in frequency domain. Compared with the methodology of extracting system phase errors from SAR echo data, the method addressed in this paper has two advantages: it is convenient to use since it is independent of ground objects; it can extract system phase errors as well as amplitude errors. Experimental results indicate that the method is very effective to improve image quality.
2005, Vol. 27 
