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  • This collection contains Sentinel-1 Level-1 Ground Range Detected (GRD) products which consist of focused SAR data that have been detected, multi-looked and projected to ground range using an Earth ellipsoid model. Sentinel-1 is a polar-orbiting, all-weather, day-and-night C-band radar imaging mission funded by the European Union and carried out by the ESA within the Copernicus Programme, consisting of a constellation of two satellites. Sensor: C-SAR (Synthetic Aperture Radar) Repeat rate: 12 days (1 satellite), 6 days (2 satellites) Launch date: 03 April 2014 Archive start date: 12 April 2014 Mission Status: ongoing Terms and conditions for the use of Sentinel data Sentinel-1 Mission Overview Sentinel-1 Level-1 GRD Products Overview Spatial resolution of Sentinel-1 Level-1 GRD data File format of measurement data: GeoTIFF Suggested software: ESA SNAP/Sentinel Toolbox Sentinel-1 acquisition plans: