【摘要】 针对脱离地面支持自主定轨的导航应用需求,提出了基于星间链路双向测距的自主导航定轨算法。文章分析了导航星座星间链路双向伪距测量模型,给出了分布式自主定轨数据流程,设计了导航星座基于星间链路分布式自主定轨算法。根据国际卫星导航服务组织公开的真实GPS系统事后精密星历,对本文设计的自主定轨算法进行仿真验证,结果表明:采用该设计的自主导航算法在自主定轨90天末期,用户测距误差(URE)达到30m左右,验证了该设计的自主定轨算法具有较高的自主定轨精度。更多还原

【Abstract】 In this paper,a two-way satellite cross link-based distributed autonomous orbit determination algorithm is proposed for the navigation for autonomous orbit determination requirements in the absence of ground support of global satellite navigation system.The satellite navigation constellation cross link two-way pseudo-range measurement model is analyzed.The data flow of the distributed autonomous orbit determination algorithm is given.According to International Satellite Navigation Services Organization published actual GPS precise ephemeris of the system,the autonomous orbit determination algorithm is simulated and verified.Simulation results show that the user range error(URE) of the autonomous orbit determination algorithm is about 30 m in the late 90 days,and the design algorithm has higher autonomous orbit determination accuraty.更多还原