A new era of InSAR applications with Sentinel-1: A case study of severe ground subsidence in California Central Valley

The launch of Sentinel-1 constellation raise a new era for InSAR applications and time series analysis. The wide coverage, fine temporal and spatial resolution, precise control of orbits and the free distribution policy bring more new chances than ever to earth observations applications. In this experiment we use Sentinel-1A data that covers a period of one year and a half (from November 2014 to June 2016) to study the ground movement of California Central Valley. Two different datasets were used and persistent scatterers interferometry technique was adopted for the time series analysis. The result indicates severe ground subsidence inside the study area, reaching a maximum rate of approximately 250 mm/yr at some locations.