基于异步通信链路的星间基线精密测量技术研究

Inter-satellite Baseline Measurement Technology via Asynchronous Communication Link

卫星成员之间信息共享、星间基线测量是分布式航天器(Distributed Spacecraft,DS)实现多星协同完成天基虚拟探测任务的关键技术。该文提出一种分布式航天器星间通信/基线测量的综合链路体制,重点研究了基于星间异步通信链路的双向异步传输帧非相干扩频测距的方法,详细给出算法的计算公式推导和模型误差分析。技术验证系统的实验结果表明该文提出的方法性能指标先进、信道利用率高、功能集成度高,为型号任务提供了一种先进的设计理念。

Information sharing and baseline measurement inter-satellites are key technologies for the space based virtual exploring mission of Distributed Spacecraft（DS）. The integrated mode of inter-satellite communication and baseline measurement for DS is proposed, the method of precisely ranging and time synchronization by bidirectional Asynchronous transfer frame via inter-satellite direct sequence spread spectrum link are researched, then the iteration algorithm of asynchronous ranging/time synchronization and model error of the algorithm is proposed and analyzed. The experiment results and analysis of experimenting system show that the integrated mode of inter-satellite communication and baseline measurement presented in the paper achieves excellent precision, functions integrated in one device with more effective utilization of radio channel, and provides a advantage design approach for the space mission of DS.