A New Calibration Algorithm of Interferometric Parameters for Dual-antenna Airborne InSAR

It is significant to calibrate interferometric parameters of dual-antenna airborne InSAR systems for deriving accurate DEM with large areas. A new calibration model considering phase offset,baseline length and baseline angle was proposed in order to calibrate interferometric parameters effectively,which was induced from the basic theory of DEM deriving from InSAR. And its solution scheme was designed. The calibration experiments of interferometric parameters were done with height control points measured by GPS to calibrate the dual-antenna airborne InSAR system researched independently by Institute of Electronics,Chinese Academy of Sciences. The errors of heights derived with calibrated interferometric parameters were calculated,as validated the proposed calibration model and its solution algorithm.