基于河北省CORS的区域电离层模型精度分析  

Accuracy Analysis of Regional Ionospheric Model Based on Hebei CORS

作　　者：吴文坛 王新广 石少坚 史进志 郧晓光 WU Wentan;WANG Xinguang;SHI Shaojian;SHI Jinzhi;YUN Xiaoguang(Hebei Province Natural Resources Archives,Shijiazhuang 050031,China)

机构地区：[1]河北省自然资源档案馆,河北石家庄050031

出　　处：《地理空间信息》2023年第1期148-151,共4页Geospatial Information

基　　金：河北省技术创新引导计划项目科技冬奥专项资助项目(21477603D);河北省自然资源厅科技资助项目(324-0801-JBN-NX2P)。

摘　　要：为提高区域电离层模型和导航定位服务的精度,利用河北省连续运行参考站系统(CORS)6个基准站的GPS卫星观测数据进行区域电离层建模和接收机差分码偏差(DCB)估计,并引入中国科学院(CAS)发布的电离层产品内插得到的垂直总电子含量(VTEC)进行区域电离层模型精度验证。实验结果表明,估计的单日GPS卫星DCB与产品值精度相当,偏差控制在0.5 ns以内;河北省CORS站GPS系统接收机DCB稳定性较好,5 d的标准偏差均小于0.1 ns;利用河北省CORS建立的区域电离层TEC在地磁平静期与磁暴期均与CAS产品值具有较高的一致性,TEC偏差控制在2 TECU以内。河北省区域电离层模型能有效监测电离层TEC在不同地磁状态下的时空变化,提高区域导航定位服务水平。To improve the accuracy of regional ionospheric model and navigation and positioning service,we used GPS observations from 6 stations of continuous operational reference system(CORS)in Hebei Province to establish regional ionospheric model and estimate differential code bias(DCB)of receivers.Then,we used the ionospheric product provided from Chinese Academy of Sciences(CAS)to verify the accuracy of regional ionospheric model.The results show that the accuracy of GPS satellite DCB is consistent with the products.The bias of satellite DCB is less than 0.5 ns.The DCB of GPS receivers from Hebei CORS has a good stability,and the 5-day standard bias is less than 0.1 ns.The regional ionospheric TEC established by Hebei CORS has a high consistency with CAS product in geomagnetic calm period and geomagnetic storm period.The TEC bias is controlled within 2 TECU.The regional ionospheric model in this paper can effectively monitor the spatio-temporal variation of ionospheric TEC under different geomagnetic conditions,and provide services for regional navigation and positioning.

关 键 词：CORS 区域电离层模型 DCB VTEC 

分 类 号：P228.4[天文地球—大地测量学与测量工程]