A new method of weighted choice in InSAR Least Squares unwrapping

Abstract: The de-coherence phenomena such as Low-SNR radar signal, shadows and layover caused by topography, etc., causing phase data discontinuity, makes the result of unwrapping phase inaccuracy or even completely wrong. Based on the analysis of influencing factors to weight choice, this thesis develops a new method to choose the weights based on the measure of the confidence in the frequency domain. Experiments show that it could overcome the defect of sub-estimate to the slope of least squares method very well, which has a better rationale, stability and performance.