Analysis and Research on TT&C Coverage of Typical Constellations Based on Land-Based TT&C System

Aiming at the coverage of typical constellations based on land-based TT&C system, this paper analyzes the visibility of constellations from three dimensions: single station, single satellite, TT&C network and TT&C network. Combined with the constellation configuration of a typical “1100 km orbit constellation” and the feasibility observation station, the analysis method of TT&C coverage is introduced with the visible time, the number of visible links and the maximum return visit interval as the demand indicators, and constructive suggestions are put forward on five design indicators such as satellite TT&C arc segment, real-time control of satellite number, single station equipment configuration, maximum emergency response time and telemetry return rate required for TT&C design in subsequent constellation design.