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The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences. Vol. XXXVII. Part B7. Beijing 2008 
Figure. 2 Interferogram generated by unfiltered pair Figure. 3 Interferogram generated by filtered pair 
Figure. 4 Coherence estimated by unfiltered pair Figure. 5 Coherence estimated by filtered pair 
Figure. 6 Coherence Distribution obtained by unfiltered pair Figure. 7 Coherence Distribution obtained by filtered pair 
Interferometric 
Phase 
P 
SD 
SPD 
Coherence p 
SD 
Unfiltered pair 
140.85 
68.35 
2.3922x10 s 
62.95 
39.97 
Filtered pair 
140.89 
68.42 
2.3976x10 s 
62.95 
39.96 
Table. 4 Statistics of coherence and interferometric phase 
By visual judgment, we could not discriminate which coherence of the coherence and interferogram - Mean (p) SD, and SPD 
and interferometry are better, and we thus use several statistics (Sum of Phase Difference) as the quantitive evaluating indexes.