Assessment of global ionospheric maps over continental areas using precise point positioning technique

被引：9
|
作者：
Wang, Cheng [1 ,3 ]
Fan, Lei [2 ]
Wang, Zhipeng [2 ]
Shi, Chuang [2 ,3 ]
机构：
[1] Beihang Univ, Res Inst Frontier Sci, Beijing, Peoples R China
[2] Beihang Univ, Sch Elect Informat Engn, Beijing, Peoples R China
[3] Collaborat Innovat Ctr Geospatial Technol, Wuhan, Hubei, Peoples R China
来源：
JOURNAL OF SPATIAL SCIENCE | 2020年 / 65卷 / 01期
基金：
中国国家自然科学基金;
关键词：
Ionosphere; GIM; assessment; precise point positioning; total electron content; TOTAL ELECTRON-CONTENT; F-REGION; VTEC MAPS; GPS DATA; SATELLITE; ALGORITHM; DENSITY; SERVICE;
D O I：
10.1080/14498596.2019.1654943
中图分类号：
P9 [自然地理学];
学科分类号：
0705 ; 070501 ;
摘要：
In this study, an approach based on precise point positioning (PPP) is proposed for the assessment of global ionospheric maps (GIMs). This assessment is performed by comparing GIMs with vertical total electron content (VTEC) values retrieved using the PPP technique. The results indicate that the CODG, ESAG, WHUG, and CASG ionospheric products underestimate the VTEC values. There is a high level of consistency between all GIMs and PPP-VTEC values during periods of low solar activity. In addition, almost all GIMs exhibit significant discrepancies with PPP-VTEC values over the equatorial ionisation anomaly (EIA) region during periods of high solar activity.
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页码：25 / 39
页数：15
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