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针对北斗卫星导航系统(BDS)完备性研究较少的现状,该文提出了一种导航星历中轨道观测数据的完备性监测新方法。采用轨道积分方法分析了北斗卫星的轨道残差均方根值;通过概率统计的方法,分别计算所有北斗卫星的轨道残差极限误差值(告警限差),剔除误差超限甚至粗差卫星,实现事后轨道完备性监测。另外通过比较分析剔除监测标记出的误差卫星之前和之后对测站精密单点定位的影响,验证完备性的风险性。最后通过实测数据对该算法进行了验证和分析。实验结果表明:该算法可以实现卫星轨道的监测示警,标记误差卫星,达到轨道完备性监测效果。
Aiming at the present situation that there is little research on the completeness of Beidou satellite navigation system (BDS), this paper presents a new method for the completeness monitoring of orbital observation data in navigation ephemeris. The orbital integral method is used to analyze the orbital root mean square of the Beidou satellite. By means of probability statistics, the orbital residual limit error (warning limit) of all Beidou satellites is calculated separately, the error overrun and even gross error satellites are removed, Achieve orbital integrity monitoring. In addition, the risk of completeness was verified by comparing and analyzing the influence of precision satellite positioning on the station before and after removing the error satellites marked by monitoring. Finally, the algorithm is validated and analyzed by the measured data. Experimental results show that this algorithm can realize satellite orbit monitoring and warning, mark error satellites, and achieve the orbit completeness monitoring effect.