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

Figure 5

(a) Azimuth gradient of interferometric phase for pair 2 in Table 1; (b) ionosphere-induced azimuth offset; (c) scattergram of (a) and (b), where the dashed red line represents the regressed line; (d) estimated IPS and corresponding VTEC (e).