ADOPTING BEIDOU NAVIGATION SATELLITES TO ESTIMATE VEGETATION EFFECTS ON DEFORMATION MEASUREMENTS THROUGH GNSS-BASED INBSAR

To comprehend the impact of vegetation coverage on the efficiency of deformation measurement via Global Navigation Satellite System-based bistatic Interferometric synthetic aperture radar (GNSS-based InBSAR), a comprehensive analysis was conducted based on raw data collected from the Beidou Navigation Satellite (BDS) spanning from November 13, 2023, to March 20, 2024. A coherence coefficient-based evaluation method is introduced. Meanwhile, the deformation measurement results are presented, validating the applicability of GNSS-based InBSAR observations in monitoring vegetated landsides in Chongqing. Regional analysis facilitated by subarea partitioning was employed to elucidate the effect of vegetation cover types on GNSS-based InBSAR performance. The results indicates that the coherence in areas covered by arboreal vegetation is inferior to that of areas with shrubbery coverage, proving the potential of GNSS-based InBSAR in estimating vegetation effects.