Fig. 9

Error correction results of the 2020-05-10 to 2020-06-03 interferogram for descending track 144D. Subfigures a–c represent the before-correction, correction amount, and after-correction InSAR interferogram, respectively. Warm colors (i.e., positive values) indicate surface displacement toward the satellite, and cold colors (i.e., negative values) indicate motion away from the satellite. In subfigures a–c, circles represent locations of GNSS sites, and filled colors represent the deformation values. Subfigure d represents the LOS deformation values of the GNSS sites (black open circles connecting line), and the deformation values of the adjacent InSAR pixel points before correction (blue squares connecting line) and after correction (red triangles connecting line), the numbers, names and latitude/longitude coordinates of the GNSS sites are shown in Tab. S3 in the Additional file 1