Study on geo-location of sliding spotlight mode of GF-3 satellite

GF-3 is the Chinese Synthetic Aperture Radar (SAR) satellite mission with scientific and commercial applications, which will be launched in 2016. It allows operation in Stripmap, ScanSAR and Sliding Spotlight modes in different polarizations. The Sliding Spotlight Mode is a new imaging mode widely used in high resolution SAR imaging. Considering the imaging processing model, we have modified the equivalent parameters on the base of the Range-Doppler model to improve the geometric accuracy for the sliding spotlight mode of GF-3. The simulation and TerraSAR-X experimental results show the the validity of the method.