Abstract: Compared with airborne SAR, such factors as complicated spaceborne SAR orbital motion, earth rotation, earth surface curvature as well as clutter spectrum spreading even to all azimuths spectrum due to fast spacecraft velocity etc. make the realization of spaceborne SAR/GMTI complicated. Clutter must be effectively suppressed for moving target detection. DPCA is a useful clutter suppression method. From the analysis of three-antenna spaceborne SAR doppler property and adopting doppler parameter expression given by Raney, R. K. , an algorithm of spaceborne SAR moving target detection, radial velocity estimation and location based on DPCA is developed. Finally, the computer simulation results validated its effectiveness.