Background
The Satellite Needs Working Group (SNWG)-2018 Assessment found that knowing where the land surface is deforming would help satisfy the satellite needs of all the United States (U.S.) land monitoring SNWG agencies. The North America Surface Displacement (DISP) data product uses imagery from 4 radar satellites (Sentinel-1 A/B/C and NASA/Indian Space Research Organisation Synthetic Aperture Radar (NISAR)) to identify where and when the land surface has moved from processes such as sinkholes, land subsidence, landslides, permafrost motion, volcanic unrest, earthquakes, and more, at <30 m resolution every 6, 12, or 24 days. The Sentinel-1's C-band radar observations provide a detailed deformation time series from July 2016, but have limited coverage in regions with significant vegetation. NISAR's L-band vegetation penetrating radar observations will be able to track land surface displacement in most of the ecosystems across North America. This SNWG activity is being managed by the Jet Propulsion Laboratory's (JPL) Observational Products for End-Users from Remote Sensing Analysis (OPERA) project, who oversee the development, implementations, and operations of the DISP product suite. Further information about OPERA and the DISP product suite can be found below.