A Robust Estimation Method of Interferometric Phase Based on Weighted Subspace Fitting

Interferogram estimate method based on the weight subspace fitting is presented through the subspace fitting of measured signal subspace and the subspace spanned by compound steering vectors. The proposed method can improve the performance of interferogram estimate, using the forward-backward average processing method to decorrelate the signals. The processing results from real data of InSAS show that the performance of proposed method is better and robust than the subspace projecting method’s.