A NEW METHOD OF WEIGHTED CHOICE IN INSAR LEAST SQUARES UNWRAPPING
Liu Weike 1, 2) ; and Liu Guolin 1)
1)Geomatics College, Shandong University of Science and Technology, Qingdao 266510;2)Modern Educational Center, Shandong University of Science and Technology, Qingdao 266510
Abstract The decoherence phenomena such as LowSNR radar signal, shadows and layover caused by topography etc, causing phase data discontinuous, makes the result of unwrapping phase inaccurate or completely wrong. On the basis of the analysis of influencing factors to weighted choice, a new method to choose the weightes according to the measure of confidence in frequency domain was developed. The experiments show the defect of subestimate to the slope of least squares method can be well overcome.It is proved that this method has good rational and stable performance.
