Performance Evaluation of Azimuth Offset Method for Mitigating the Ionospheric Effect on SAR Interferometry

Table 2

The mean and standard deviation values of interferometric phase before and after ionospheric correction for Yushu coseismic interferogram.

Number	Interferogram	Mean (rad.)	Std (rad.)	Improvement rate
(1)	Original for pair 1	6.6	1.5
(2)	Original for pair 2	−12.9	5.3
(3)	Ionosphere-corrected for pair 2	6.5	2.6	51%