Abstract:Based on Sentinel-1A data from January 2016 to July 2018, we obtain the ground deformation information of the main urban area in Nanchang using PS-InSAR and SBAS-InSAR time series processing methods, compare the two monitoring results, and analyze the causes of uneven ground deformation. The results show that the monitoring results of the two time series technologies are highly correlated. The deformation trend of the main urban area of Nanchang City is northeast uplift and the southeast sinking. The spatial distribution of the deformation zone includes the Meiling uplift area, Nanchang west railway station subsidence area, Ganjiang east bank subsidence area, Dengjiabu subsidence area and Nangang subsidence area, which are mainly affected by factors such as geological structure, aquifer medium, groundwater exploitation and urban construction.