Sentinel-1 System

The paper provides an overview of the Copernicus Sentinel-1 system capabilities. In particular, the characteristics of the Sentinel-1 SAR imaging modes and their key performance parameters, as well as the specifics of related attitude and orbit control modes, i.e. roll steering mode and zero-Doppler steering mode are described. In addition, the Sentinel-1 SAR interferometry (InSAR) capabilities including TOPS InSAR and the strategy for maintaining the orbital baseline are discussed.