As is well know, the interferometric coherence is a key indicator of the quality of the phase values in interferograms for InSAR processing. In order to assure unwrapping smoothly and generate reliable intereferograms, it is very important to improve the coherence degree between SAR images. By analyzing various decorrelation resources, we proposed an approach for improving coherence degree between SAR images. The experimental results indicate that this approach is feasible and effective.
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