Design of inter-satellite ranging system based on dual one-way ranging method

 Inter-satellite communication, ranging and clock synchronization (CRS) is a key technology for formation satellites to fly in formation and conduct distributed detection. Firstly, the ranging requirements of the project which is an interferometer array made up of nine satellites in a lunar orbit is introduced. The CRS system is based on the principle of dual one way ranging measurement, its hardware design and software design are described. In hardware design, frequency division multiplexing technology (FDM) is adopted to realize the communication among the formation satellites. Closed-loop clock displine technology is conducted to reallize clock synchronizaiton among formation satellites. The CRS design is verifed by series ground tests including wired ranging test on the desk, wireless ranging test in a microwave anechoic chamber, and wireless ranging test with a vehicle. The test data reveals the feasibility and effectiveness of the CRS design in this paper.

星间通信、测距与时钟同步（Inter-satellite Communication, Ranging and Clock Synchronization, CRS）是编队卫星实现编队飞行与分布式探测的核心关键技术。本文首先介绍了某月球轨道9颗卫星组成的干涉仪阵列项目的测距需求。该CRS系统基于双向单程测距原理，详细阐述了其硬件与软件设计方案：在硬件设计中，采用频分复用技术（Frequency Division Multiplexing, FDM）实现编队卫星间的通信；针对时钟同步环节，采用闭环时钟校正技术实现编队卫星间的时钟同步。本文通过一系列地面试验对该CRS设计方案进行了验证，试验涵盖桌面有线测距试验、微波暗室无线测距试验以及车载无线测距试验。试验数据证明了本文提出的CRS设计方案具备可行性与有效性。