Abstract: In order to realize the real time measurement and control of geosynchronous orbit satellite during the process of global deployment, a TT&C scheme with comprehensive utilization of satellite ground link and inter satellite link is proposed in this paper. Based on the two stages divided by the scheme, wherein one is in the view stage and the other one is out of sight stage, a time sharing heterogeneous architecture is constructed. In this architecture, satellite ground link is mainly used in stage one when ground station can control satellite directly, and inter satellite link is the only way to measurement the object when it is out of the ground station visual range. A variety of different inter satellite links, such as inter satellite link with observation data  relay satellite and TDRS/BD inter satellite link, are utilized. Furthermore, the communication link budget is calculated and the mission reliability is analyzed. The result shows that the scheme is feasible and reliable.

Key words: geosynchronous orbit, intersatellite link, real time control link, reliability