Abstract:This paper takes the Fengyun-3G satellite as the research object and deeply explores the high-precision control technology for remote sensing satellites in very-low inclination orbits. Three key technical difficulties are systematically analyzed, including high-precision attitude control under complex environmental interferences, low-fuel-consumption and high-precision autonomous constellation maintenance under time-varying atmospheric drag, and high-precision coordinated control of multi-axis rotating bodies integrating space and ground. Ten corresponding solutions are proposed, such as high-precision attitude determination in complex environments, low-fuel-consumption integrated autonomous orbit maintenance, and solar panel flattening in the shadow. Verified by on-orbit or semi-physical simulation tests, these solutions have significantly improved the satellite’s control accuracy and provide strong technical support for the development of remote sensing satellite technology in very-low inclination orbits.