中文摘要：

针对全球卫星导航定位系统的完备性监测领域中,用户保护水平估计不准会使系统性能降低或产生误警信息等问题,该文比较BDS系统、GPS系统、BDS/GPS组合系统下实时用户保护水平,并验证BDS系统下的实时用户保护水平是否满足用户的需求。利用水平保护水平和垂直保护水平模型,选取了3个监测站2d的监测结果分析了GPS系统、BDS系统与GPS/BDS系统组合的实时用户保护水平,并验证了该算法的稳定性。

英文摘要：

With the development of the global satellite navigation and positioning system,BDS satellite systems are also constantly improve.Completeness monitoring is a hotspot of GNSS system research field.XPL is one of the important indicators to ensure the normal use of satellite navigation system.To compare the BDS system,GPS system and BDS/GPS combination of real-time XPL,and verify the realtime XPL of BDS systems whether to meet the needs of users,this paper used the HPL and VPL model to select the monitoring results of the three stations for two days to analyze the real XPL of GPS system/BDS systems and GPS/BDS combinations system,and verified the stability of the algorithm finally.