The Geostationary Synthetic Aperture Radar (GEO SAR) concept aims at defining an Earth Observation system able to provide regional coverage with large swaths and subcontinental access with a very short revisit time by exploiting the unique characteristics of the GEO orbit. These peculiar characteristics make GEO SAR suitable for imaging and interferometry of fastevolving large-scale phenomena, such as ground motion or water vapor. The design of the orbit for a GEO SAR is discussed to provide, at one time, wide imaging capability, compensation for the huge power loss due to the distance, and short interferometric revisit. In particular, interferometry imposes constraints on the repeatability of the orbit that are far more restrictive than the control required for telecommunication SATelliteS (COMSATS). Here, two different specific control approaches are proposed to ensure small normal baselines and maximum angular band overlap between subsequent acquisitions., one based on the conventional COMSATS control, and a second one that aims to reduce the number of maneuvers and, ultimately, the amount ∆V .