GNSS空间信号连续性监测与评估

Monitoring and Assessment of GNSS Signal in Space Continuity

针对GNSS连续性评估对民航领域的重要影响,以GPS为代表从可靠性原理出发提出了一种空间信号(SIS)连续性评估模型;并对联邦航空局(FAA)发布的1999到2015年的GPS故障报告进行统计分析,得到卫星的连续性概率;最后与GPS标准定位服务性能标准(GPS SPS PS)中的连续性概率指标0.9998对比,验证了GPS SIS连续性的符合性。另外针对我国北斗卫星导航系统现状,提出了北斗导航系统连续性监测与评估的建议,对北斗导航系统关于连续性的研究具有重要参考价值。

According to the continuity performance of GNSS for the influence on the field of civil aviation,an evalua-tion model of continuity of Signal-In-Space（SIS）is put forward referring to the principle of reliability on GPS. Then,the GPS failure reports,which were released by Federal Aviation Administration（FAA）from the year 1999 to 2015,were calculated and analyzed. The continuity probability of each satellite was got. Finally,the data were comparedwith the continuity probability index 0.999 8,which released by the 2008 version of the GPS standard positioningservice performance standard（GPS SPS PS）. The conformity of GPS SIS continuity was verified. In addition,refer-ring to the present situation of Bei Dou satellite navigation system in our country,suggestions about its continuity＇smonitoring and assessment were put forward. Meanwhile,it has great reference value to the study of the continuity ofBei Dou navigation system.GNSSBei Dou Satellite Navigation SystemBDSsignalinspacecontinuityassessment