QZSS增强信号对GPS定位增强效果的分析  

Analysis of Performance of QZSS’s Augmentation Signals Augmenting GPS’s Positioning Accuracy

作　　者：江永生 JIANG Yongsheng(Surveying and Mapping Institute Lands and Resource Department of Guangdong Province,Guangzhou Guangdong 510500,China)

机构地区：[1]广东省国土资源测绘院

出　　处：《北京测绘》2019年第8期969-973,共5页Beijing Surveying and Mapping

摘　　要：QZSS系统与GPS系统具有较好的兼容性,同时其播发两个频段的增强信号,增强信号中包括GPS卫星轨道、钟差、电离层等改正信息,通过增强服务可以使GPS用户获得更高精度的实时定位结果。本文利用CCJ2、GUAM、MIZU、TSK2测站的实测数据对QZSS增强信号对GPS定位增强的效果进行分析。结果表明:基于L1-SAIF信号的SLAS增强服务能有效提高用户的GPS单点定位精度;基于LEX信号的CLAS增强服务目前可以实现分米级实时定位精度。QZSS has a good compatibility with GPS.QZSS broadcasts augmentation signals including GPS correction information of orbit, clock and ionosphere delay on two frequencies.It could provide GPS users with higher positioning accuracy through this augmentation service.In this paper, analysis of performance of QZSS’s augmentation signals augmenting GPS’s positioning accuracy was carried out using measured data from four stations CCJ2, GUAM, MIZU and TSK2.The results shown that: sub-meter level augmentation service based on L1-SAIF signal could improve the accuracy of users’GPS single point positioning.Centimeter level augmentation service based on LEX signal could currently realize real-time positioning service with the accuracy of a decimeter level.

关 键 词：准天顶系统(QZSS) 星基增强 全球定位系统(GPS) 高精度定位 

分 类 号：P228.4[天文地球—大地测量学与测量工程]