Feasibility study of along-track SAR interferometry with the COSMO-skymed satellite system

Currently, particular interest is growing on spaceborne along-track synthetic aperture radar interferometry (ATI-SAR). In this work, we investigate the possibility of applying the ATI-SAR technique to the Italian COSMO-SkyMed satellite system with the latest hardware concept of split antenna mode. A preliminary study on the possible achievable accuracy on current velocity and coherence time estimation, as a function of environmental and radar parameters, is developed, based on Cramer-Rao lower bound analysis and physical signal models. Possible multibaseline ATI configurations are included in the study. First results are presented about the choice of the optimal split configuration.