A Three-Dimensional Baseline Calibration Method of Spaceborne InSAR

Accuracy of baseline vector is one of important factors that affect the accuracy of height inspaceborne InSAR.By calibrating the baseline vector can effectively improve target’s position accura-cy,now most baseline calibration methods adopt two-dimensional model.This model ignores along-track baseline,which decrease calibration accuracy.According to working theroy of spaceborne In-SAR,this paper presents a three-dimensional baseline model.By constructing the local moving coordi-nate system,the proposed method simplifies parameters and optimizes process in calibration.Resultsshow that the proposed method has practical value and can be used in the calibration of high accuracybaseline vector.