Abstract Satellite autonomous navigation is an important function of the BeiDou-3 navigation System (BDS-3). Satellite autonomous navigation means that the navigation satellite uses long-term forecast ephemeris and Inter-Satellite Link (ISL) measurements to determinate its own spatial position and time reference without the support of the ground Operation and Control System (OCS) for a long time to ensure that the navigation system can normally maintain the time and space reference. This paper aims to analyze the feasibility of distributed autonomous navigation algorithms. For the first time, a ground parallel autonomous navigation test system (GPANTS) is built. The performance of distributed autonomous navigation is then analyzed using the two-way ISL ranging of BDS-3 satellites. First, the BDS simulation platform and the GPANTS are introduced. Then, the basic principles of distributed satellite autonomous orbit determination and time synchronization based on ISL measurements are summarized. Preliminary evaluation of the performance of the BDS-3 constellation autonomous navigation service under ideal conditions through simulation data. Then the performance of autonomous navigation for 22 BeiDou-3 satellites using ISL measurements is evaluated. The results show that when satellites operate autonomously for 50 days without the support of any ground station, the User Range Error (URE) of autonomous orbit determination is better than 3 m, and the time synchronization accuracy is better than 4 ns.

中文翻译：

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基于北斗系统仿真平台的北斗三号分布式自主导航分析

摘要 卫星自主导航是北斗三号导航系统（BDS-3）的一项重要功能。卫星自主导航是指导航卫星在长时间没有地面操作与控制系统（OCS）支持的情况下，利用长期预报星历和星间链路（ISL）测量来确定自己的空间位置和时间基准，确保导航系统能正常保持时空参考。本文旨在分析分布式自主导航算法的可行性。首次构建了地面并行自主导航测试系统（GPANTS）。然后使用 BDS-3 卫星的双向 ISL 测距分析分布式自主导航的性能。首先介绍北斗仿真平台和GPANTS。然后，总结了基于ISL测量的分布式卫星自主定轨和时间同步的基本原理。通过仿真数据初步评估理想条件下北斗三号星座自主导航服务的性能。然后评估了使用 ISL 测量对 22 颗北斗三号卫星进行自主导航的性能。结果表明，卫星在没有任何地面站支持的情况下自主运行50天时，自主定轨用户距离误差（URE）优于3 m，时间同步精度优于4 ns。通过仿真数据初步评估理想条件下北斗三号星座自主导航服务的性能。然后评估了使用 ISL 测量对 22 颗北斗三号卫星进行自主导航的性能。结果表明，卫星在没有任何地面站支持的情况下自主运行50天时，自主定轨用户距离误差（URE）优于3 m，时间同步精度优于4 ns。通过仿真数据初步评估理想条件下北斗三号星座自主导航服务的性能。然后评估了使用 ISL 测量对 22 颗北斗三号卫星进行自主导航的性能。结果表明，卫星在没有任何地面站支持的情况下自主运行50天时，自主定轨用户距离误差（URE）优于3 m，时间同步精度优于4 ns。