Figure 2 GF-3 interferogram over Huanghua, Hebei Province, China (20170217-20170318):
(i) Time span: 29 days; Spatial baseline (orbital separation): 250 m; (ii) The range changes
in the radar line of sight (LOS) are shown. Positive implies that the surface moves away from
the satellite (i.e., the pixel exhibits subsidence), and negative implies uplift in LOS; (iii)
Uplift signals are observed in Nandagang Wetland Conservation Area (denoted by a red
ellipse).