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 针对导航在区域完好性监测网可视弧段之外难以实现基于地面监测站的系统级完好性监测问题,提出一种基于星间链路辅助支持的导航自主完好性监测方法。该方法通过利用星间组合观测值,分离星钟误差和星历误差,采用基于平稳时间序列的非稳态异常检测算法对导航星载原子钟相位抖动及频率的异常漂移进行监测;采用基于轨道先验信息的非中心化开方分布异常检测算法对轨道异常机动进行监测,并利用星间链路组合观测量对自主完好性监测及其对全球用户完好性性能的提升作用开展仿真分析与研究。仿真计算结果表明:该方法可以在地面监测网不可视弧度内有效减小空间段部分的故障漏检概率以及系统完好性风险,缩短完好性告警时间,提高全球导航系统的完好性服务水平。 更多还原

【Abstract】 Since it is very difficult for ground mission and control segment to monitor the satellite’s state all time and in the invisible region,a substitute integrity monitoring method depending on inter-satellite-links is proposed.It mainly focuses on designing and simulation for satellite autonomous integrity monitoring based on inter-satellite-links.By separating clock error and ephemeris error based on ISL observation,the algorithm how to detect the anomaly of satellite clock and ephemeris is studie... 更多还原