不同全球电离层格网产品在中国区域的应用精度评估与分析  

Evaluation and analysis of different global ionospheric maps over China

作　　者：盛传贞 张京奎 张宝成 SHENG Chuanzhen;ZHANG Jingkui;ZHANG Baocheng(State Key Laboratory of Satellite Navigation System and Equipment Technology,Shijiazhuang 050081,China;Innovation Academy for Precision Measurement Science and Technology,CAS,Wuhan 430000,China)

机构地区：[1]卫星导航系统与装备技术国家重点实验室,石家庄050081 [2]中国科学院精密测量科学与技术创新研究院,武汉430000

出　　处：《全球定位系统》2021年第4期8-15,共8页Gnss World of China

基　　金：湖北省自然科学基金计划项目(2020CFA048);京津冀PPP-RTK技术与应用研究项目(QYYF2017-058)。

摘　　要：基于全球卫星导航系统(GNSS)跟踪站和Jason测高卫星获得的电离层总电子含量(TEC),系统评估了国内外5家国际GNSS服务(IGS)电离层分析中心以及全球连续监测评估系统(iGMAS)综合中心的预报、快速和最终全球电离层格网产品(GIM)在中国区域的精度和标准单点定位应用性能.结果表明:不同类型GIM产品在中国区域的精度由高到低分别是最终、快速和预报GIM产品;在太阳活动水平较低时,不同GIM产品精度大致相当;在太阳活动水平较高时,西班牙加泰罗尼亚理工大学(UPC)和iGMAS的快速和最终GIM产品精度优于其他机构同类型产品.We systematically evaluated and analyzed the performance of predicted,rapid and final global ionospheric map(GIM)products,provided by 5 IGS ionospheric analysis centers and the international GNSS Monitoring and Assessment System(iGMAS)comprehensive center,over China.The ionospheric total electron content(TEC)values measured by Global Navigation Satellite System(GNSS)and Jason altimeter satellites are selected as references and performances of GIM in standard single-point positioning are also used as indices in the validation.The results showed that the order of performance from high to low of different types of GIM over China is the final GIM,the rapid GIM and the predicted GIM products.Different GIM products are found to have comparable performances over China during low solar activity.The rapid and final GIM products provided by the Universitat Politècnica de Catalunya(UPC)and iGMAS outperform other GIM products during high solar activity.

关 键 词：全球卫星导航系统(GNSS) 全球电离层格网(GIM) 电离层电子总含量(TEC) 电离层综合中心(IAAC) 国际GNSS服务(IGS) 全球连续监测评估系统(iGMAS) 

分 类 号：P228[天文地球—大地测量学与测量工程] P352[天文地球—测绘科学与技术]