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Assessment of global ionospheric maps over continental areas using precise point positioning technique
Journal of Spatial Science ( IF 1.0 ) Pub Date : 2019-09-03 , DOI: 10.1080/14498596.2019.1654943
Cheng Wang 1, 2 , Lei Fan 3 , Zhipeng Wang 3 , Chuang Shi 2, 3
Affiliation  

ABSTRACT 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.

中文翻译:

使用精确点定位技术评估大陆地区的全球电离层地图

摘要 在这项研究中,提出了一种基于精确点定位 (PPP) 的方法来评估全球电离层图 (GIM)。该评估是通过将 GIM 与使用 PPP 技术检索到的垂直总电子含量 (VTEC) 值进行比较来进行的。结果表明 CODG、ESAG、WHUG 和 CASG 电离层产品低估了 VTEC 值。在低太阳活动期间,所有 GIM 和 PPP-VTEC 值之间具有高度的一致性。此外,在高太阳活动期间,几乎所有 GIM 都与赤道电离异常 (EIA) 区域的 PPP-VTEC 值存在显着差异。
更新日期:2019-09-03
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