The High-Resolution Wide-Swath (HRWS) is the spaceborne Synthetic Aperture Radar system, promoted by the German Aerospace Centre, conceived to obtain simultaneously high spatial resolution and width swaths. Its main distinctive features are the multichannel architecture, the use of Digital Beamforming on receive and SCORE algorithm. The HRWS allows for a spatial resolution of 1 m over swaths 70 km wide, in the basic Stripmap mode. Whereas in ScanSAR mode, it could reach a spatial resolution of 8 m over swaths 360 km. In this paper an advanced operational mode, denoted Multisubpulse, is presented. It further exploits the flexibility offered by the HRWS by using multiple subpulses. The achievable SAR imaging performance of the HRWS in this mode is numerically analyzed.