Airborne InSAR Calibration Based on Sensitivity Equations

Conference: EUSAR 2006 - 6th European Conference on Synthetic Aperture Radar
05/16/2006 - 05/18/2006 at Dresden, Germany

Proceedings: EUSAR 2006

Pages: 4Language: englishTyp: PDF

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Wang, Yanping; Xiang, Maosheng (National Key Laboratory of Microwave Imaging Technology, Institute of Electronics, Chinese Academy of Sciences, China)
Peng, Hailiang (Institute of Electronics, Chinese Academy of Sciences, China)

Airborne across-track interferometric synthetic aperture radar (InSAR) is a suitable technique for the generation of high accurate digital elevation models (DEMs), which has been demonstrated again by the Experimental Airborne InSAR System, developed by Institute of Electronics, Chinese Academy of Sciences. In order to achieve a high quality DEMs when using such systems operationally, calibration procedures must be applied. This paper firstly presents theoretical models describing the impact of key error contributors on the measured terrain elevation. Then, an iterative calibration algorithm and parameter estimation method is given. Thirdly, in order to determine a preferable calibration scheme, the analyses and validation of calibration algorithm using semi-simulated airborne InSAR data under different combination schemes of parameter biases are provided.