Integrity is very important for the global navigation satellite system(GNSS),which is related to whether it can be safely applied.Satellite autonomous integrity monitoring(SAIM)tech-nology is the frontier trend of the development of integrity monitoring technology,so that all GNSS around the world are competing to develop it.This paper introduces the significance of the design and implementation of BDS-3 SAIM technology,and expounds the BDS-3 SAIM technology from two aspects of function design and implementation principle.Aiming at the problems of nor-mal distribution characteristics and long-term stability of actual on-orbit monitoring data of SAIM,the monitoring data of a medium Earth orbit(MEO)satellite from July 31,2020 to July 31,2021 are randomly selected to obtain the distribution characteristics of real on-orbit monitoring data.Fi-nally,the necessary suggestions for the follow-up development of alarm threshold optimization,hierarchical alarm strategy design and autonomous monitoring of ephemeris integrity are put for-ward,aiming to provide reference for Beidou system to provide better integrity services for global users.
关键词
全球卫星导航系统/北斗三号系统/卫星自主完好性监测/告警门限/分级告警/星历自主监测
Key words
Global navigation satellite system(GNSS)/BeiDou global navigation satellite system(BDS-3)/Satellite autonomous integrity monitoring(SAIM)/Alarm threshold/Grading alarm/Autonomous monitoring of the ephemeris
维普
万方数据