BDS轨道完备性监测设计与实现

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。

Design and implementation of BDS satellite orbit integrity monitoring

A new approach of orbit integrity monitoring in navigation ephemeris was proposed in this paper for lacking research on the completeness of the BeiDou satellite navigation system (BDS).The BDS satellite's orbit RMS residual value was analyzed by orbit integration methods;the error value of BDS satellite's orbit residual limits (the alarm tolerance value)was calculated by probability and statistics methods,thus excluding even crude overrun error poor satellite,and then achieving the later orbit integrity monitoring.Besides,the risk was tested by analyzing the impact of the station precise point positioning before and after excluding the satellite.Finally,the algorithm verification and analysis of results based on measured data was proved.Test results showed that this algorithm could monitor warning satellite orbit and mark error satellites to reach orbit integrity monitoring effect.