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Effects of terrain slopes on residues in interferometric SAR

Xiang Maosheng, Li Shukai (Institute of Remote Sensing Applications, Beijing,100101,China)  
Phase unwrapping is a main problem during interferometric SAR processing for DEM. Residues make phase unwrapping difficult sophisticated. After residues are identified correctly, phases can be unwrapped in a consistent manner if suitable branch cuts are made. The process of selecting branch cuts is identifying the correct segments of phase discontinuity caused by noise or layover. This paper presents the probability of segments of phase discontinuity caused only by noise in SAR interferograms. Results have proved that the probability can be influenced both by terrain slopes and decorrelation. Moreover, the probability of residues grows up with the increase of terrain slopes, and is reduced with the increase of the correlation coefficient that is well known. In addition, the paper also presents the probability of segments of phase discontinuity when correlation coefficient equals zero and 1.
【CateGory Index】: P228
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Chinese Journal Full-text Database 10 Hits
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