A Improved Calibration Method of Interferometric Parameters for Dual-Antenna Airborne InSAR

Interferometric parameters calibration of InSAR system can acquire both baseline parameters and interferometric phase bias. It is significant to calibrate interferometric parameters of dual-antenna airborne InSAR systems for deriving accurate DEM. First of all, the error model based on sensitivity equations was educed by differentiating InSAR imaging equations, then the least square control point calculating slant range difference, and phase information of reconciliation through the interferometric phase information and unwrapped phase difference to the essence of the slant range, and to obtain high precision inclined to participate in the interferometric parameters calibration from the phase difference calculation. The experiment confirmed that the interferometric parameters obtained by means of high precision.