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

Figure 4

(a) Topographic map of 2010 Yushu earthquake. The black dotted rectangle denotes the spatial coverage of experimental L-band ALOS-1/PALSAR images and red pentagram shows the epicentre positions of the mainshock; (b-c) interferometric phase and azimuth offset between January 15, 2010, and July 18, 2010, respectively; (d-e) interferometric phase and azimuth offset between January 15, 2010, and April 17, 2010, respectively.