“天问一号”着陆中继通信系统设计与验证

Design and Verification of Relay Communication System During Entry Descent and Landing for Tianwen-1 Mars Probe

“天问一号”火星探测任务是中国通过一次发射,实现对火星“绕、落、巡”的探测任务。火星探测任务的进入、下降及着陆段(Entry,Descent and Landing,EDL)是整个任务过程中最为重要的环节之一。基于该过程中继通信任务特点,介绍了“天问一号”火星探测器为适应EDL段通信任务时序复杂、高自主性、黑障现象以及高动态性等特点的中继通信系统方案及关键技术。同时结合“天问一号”软着陆任务,对EDL段中继通信在轨验证情况进行了总结和分析。提出的中继通信系统方案圆满支持了“天问一号”火星探测EDL段中继通信任务。

Tianwen-1 Mars exploration mission is a mission for China to“Orbit,Fall and Patrol”Mars though a launch.Entry,Descent and Landing(EDL)of Mars exploration mission is a key part in the whole mission process.Based on the characteristics of relay communication task in this process,this paper introduces the relay communication system scheme and key technology of Tianwen-1 Mars probe adapted to the characteristics of complex timing,high autonomy,black barrier phenomenon and high dynamics of EDL segment communication task.At the same time,combined with the landing mission of Tianwen-1,the in orbit verification of relay communication in EDL is summarized and analyzed.The relay communication scheme proposed in this paper successfully supports the relay communication mission of the EDL section of the Mars Exploration of Tianwen-1.