INTERFEROMETRIC CALIBRATION OF THE X-SAR SYSTEM ON THE SHUTTLE RADAR TOPOGRAPHY MISSION (SRTM/X-SAR)

摘要

We present the concept for the interferometric calibration of the X-SAR system on SRTM. Results of the analysis of the height sensitivity to key system parameters used in the interferometric height reconstruction are discussed. We consider possible error sources in the X-SAR instrument electronics and bias effects in determining the baseline vector. We outline the methods for calibrating the instrument phase and the interferometric geometry parameters. Simulation results using a Maximum a Posteriori estimator are presented.