Precision Assessment for Resolving 3-D Mining Deformation Using Error Propagation Model Based on Spaceborne Single- and Multi-Track Insar

Coal mining activities will result in long-term multi-level surface deformation, causing significant damage to the infrastructure and environment. Currently, the three-dimensional (3-D) mining deformation could be resolved based on single-track or multi-track Interferometric Synthetic Aperture Radar (InSAR). Before starting to monitor a study area, it is necessary to determine what sort of methodology would best meet the accuracy requirement of 3-D deformation. To accomplish this, we present an error propagation model that can clarify the relationship of error propagation between the multi-track measurements in the radar line-of-sight (LOS) or azimuth directions and the 3-D deformation in the vertical, east, and north directions. Simulation results show that the accuracy of our proposed model could reach 1.2mm, 1.3mm, and 11.6m in the vertical, east, and north directions, respectively. Accordingly, we give the precision assessment of five cases for resolving 3-D mining deformation by using our proposed model.