Monitoring and analysis of deformation in some areas of Xingtai City from 2019 to 2022 based on MCTSB-InSAR technology

The North China region is the area most severely affected by ground subsidence disasters in China, with noticeable subsidence phenomena occurring particularly in the southern parts. This study selects certain areas in Xingtai City, located in the central-southern region, as the research zone. We employ Multi-Coregistered Target Small Baseline InSAR technology (MCTSB-InSAR) and utilize 98 scenes of Sentinel-1A C-band ascending track data to obtain InSAR time series data from 2019 to 2022. The results reveal annual ground subsidence information for the study area, indicating that both the subsidence range and amount have gradually decreased each year. By selecting characteristic points, we analyze the spatiotemporal variation features, which demonstrate a continuous downward trend in ground subsidence, particularly with significant fluctuations occurring between May and July 2020.