交会对接任务天基双目标测控通信设计

Design of a Space-Based Dual-Object TT&C System for China’s First Rendezvous and Docking Mission

针对交会对接任务对测控通信提出的高覆盖率和双目标测控等需求的问题,分析2颗中继卫星能够提供的覆盖率,设计双目标测控工作模式以及天地协同机制,计算中继链路的性能,分析表明,天基测控可提供约72%的测控覆盖率,能够支持双目标测控,链路余量满足要求;统计了任务中关键段落的测控通信工作情况,分析结果和实际任务情况验证了天基测控在交会对接任务测控通信中的重要作用;最后提出后续任务改进和完善的建议。

A dual-object TTC operation mode and space-ground coordination mechanism are designed to meet high coverage and dual-object TTC requirements of China＇s first rendezvous and docking mission.Performance of the links between user spacecraft and TDRSS satellites are computed.The results show that the TDRSS satellites provide about 72% coverage,meeting dual-object TTC requirements,and the link margin meets mission requirements.Statistics is given for TTC and communication for critical segments of the mission.The design is validated through simulation and China＇s first rendezvous and docking mission.Suggestions are finally given for further improvement in follow-up missions.