空间站高精度时频微波链路系统体制设计及关键技术

摘要

在空间站上建立较地面高一个量级的时间频率系统,通过高精度时频链路为全球民用系统提供更为精准的空间时频基准,具有非常重要的科学和军事意义.首先,探讨了国外在空间站高精度时频传递技术方面的现状和应用;其次,在空间站双向时频传递原理的基础上,对比欧空局(ESA)的方案提出了适合我国空间站时频系统微波链路的设计思路;最后,重点分析和研究了高精度时频传递的两项关键技术,对于开展详细系统设计以及实现皮秒量级测量精度具有重要作用.%It is significant for science and military to establish a time and frequency system in space station to provide a more precise time and frequency standard through high accuracy time and frequency link for global civilian users.Firstly,the status and application of high accuracy time and frequency transfer technology for space station abroad is discussed.Then,based on the principle of two way time and frequency transfer(TWTFT),the idea of system design for China's space station microwave link(MWL) is proposed compared with the project of European Space Agency(ESA).Finally,two key technologies of high accuracy time and frequency transfer are analyzed,which are quite important for particular system design and realizing the picosecond level precision.