摘要
北斗卫星导航系统完好性参数包括用户差分距离误差(UDRE)、区域用户距离精度(RURA)和格网点电离层垂直延迟改正数误差(GIVE)。本文研究了UDRE、RURA及GIVE的算法,分析仿真了UDRE和RURA一天中的变化,给出了格网点(IGP)97(40°N,115°E)一天内GIVE的变化曲线,验证了算法的可行性。仿真结果表明,UDRE、RURA以及GIVE的算法均能够以99.9%的置信度限定等效钟差改正数和格网点电离层延迟改正误差,为用户提供可靠的完好性监测。
The integrity parameters of BeiDou satellite navigation system include user differential range error （UDRE）, regional user range accuracy （RURA）, and grid ionosphere vertical error （GIVE）. In this paper, the algorithms about UDRE, RURA and GIVE are researched, the variation of the UDRE and RURA in a whole day are analyzed and simulated, the variation curve of the GIVE in a whole day is presented about ionospheric grid point（IGP） No. 97（40°N, 115°E）, and the feasibility of the algorithms are verified. The simulation shows that the algorithms of UDRE, RURA and GIVE can limit the equivalent clock error and the grid point ionospheric delay error with a confidence level of 99.9%, and reliable integrity monitoring can be provided for users by these parameters.
出处
《现代导航》
2015年第1期17-22,共6页
Modern Navigation
关键词
北斗系统
完好性
UDRE
RURA
GIVE
BDS
Integrity
UDRE （User Differential Range Error）
RURA （Regional User Range Accuracy）
GWE （Grid Ionosphere Vertical Error）
