Detection of Surface Displacement from Large Baseline Data Pairs by Multi-Temporal D-Insar with Application to Bandung Basin, Indonesia

The perpendicular distance and temporal difference of baselines are critical factors for determining the displacement accuracy of multi-temporal Differential Interferometric Synthetic Aperture Radar (D-InSAR) technique. This study aims to evaluate the capability of D-InSAR technique using large perpendicular and temporal baselines for measuring the ground displacement caused by tectonic movement and anthropogenic activity in the Bandung basin, West Java, Indonesia. Small baseline subset (SBAS) D-InSAR technique is adopted to clarify the spatio-temporal displacement pattern of the basin, and its accuracy is verified statistically using Pearson's correlation coefficient and root-mean-square error by comparing the estimated displacements with the displacement data by GPS. The results highlight two displacement patterns in the basin: anthropogenic-caused subsidence in the middle urban area and tectonic-caused uplift in the northern and southern parts around the faults.