摘要
伽利略系统(Galileo)是全球四大卫星导航系统之一,目前已初步具备全球定位能力。研究Galileo的信号质量和双/三频定位性能不仅对Galileo系统应用具有重要价值,对多全球卫星导航系统(GNSS)融合定位也有重要促进作用。在使用基准站网(MGEX)地面跟踪站的基础上,分析了伽利略信号的载噪比、多路径、以及双/三频精密单点定位(PPP)的定位精度。结果表明,Galileo与GPS相比,载噪比E5>E5a≈E5b≈L5>E1≈L1>L2,多路径误差E5E1<L1<E5a≈E5b≈L2≈L5;精密单点定位结果表明,双/三频定位结果在厘米级,三频定位结果略优于双频。
Galileo system is one of GNSS,and it has preliminary obtained global positioning capability.The research of Galileo signal quality and bi/tri-frequency positioning performance not only contributes to Galileo system,but also promotes the fusion positioning of multi GNSS.On the basis of existing MGEX ground tracking stations,this paper focuses on the analysis of Galileo carrier to noise(CNR)ratio,code multipath delay,and the current stage of the precise point positioning(PPP)dual-frequency,triple-frequency static positioning accuracy.The results show that comparing Galileo and GPS,the CNR and multipath delay follow an order of E5>E5a≈E5b≈L5>E1≈L1>L2and E5E1<L1<E5a≈E5b≈L2≈L5,respectively.
作者
周星宇
陈华
安向东
ZHOU Xingyu;CHEN Hua;AN Xiangdong(GNSS Research Center, Wuhan University, Wuhan 430079, China;School of Geodesy and Geomatics, Wuhan University, Wuhan 430079, China)
出处
《全球定位系统》
CSCD
2018年第1期19-24,共6页
Gnss World of China
关键词
伽利略
载噪比
多路径误差
精密单点定位
Galileo
Carrier to Noise Ratio (CNR)
multipath delay
Precise Point Positioning(PPP)
