Consistency of seven different GNSS global ionospheric mapping techniques during one solar cycle
Consistency of seven different GNSS global ionospheric mapping techniques during one solar cycle
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DOI：
10.1007/s00190-017-1088-9
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发表时间：
2018-06
影响因子：
4.4
通讯作者：
D. Roma-Dollase;M. Hernández‐Pajares;A. Krankowski;K. Kotulak;R. Ghoddousi-Fard;Yunbin Yuan;Zishen Li-Zi
中科院分区：
文献类型：
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作者：
D. Roma-Dollase;M. Hernández‐Pajares;A. Krankowski;K. Kotulak;R. Ghoddousi-Fard;Yunbin Yuan;Zishen Li-Zi
在全球导航卫星系统国际服务的范围内，自1998年以来，全球导航卫星系统的几个电离层相关分析中心开发了不同的技术，以提供垂直总电子含量的全球电离层图。在本文中，我们提出了在IGS的框架中创建的所有GIM的性能比较。实际上，我们比较了经典的电离层分析中心（CODE，ESA/ESOC，JPL和UPC）与新的（NRCAN，CAS，WHU）。为了以公平和完全独立的方式评估它们的质量，使用了两种评估方法：与高度计数据（VTEC高度计）的直接比较和与独立地面参考站（dSTEC-GPS）观测到的倾斜总电子含量（STEC）的差异的直接比较。这项研究的主要结论是，在一个太阳周期内进行的，是如此多的不同GIM技术和实现之间的结果的一致性。
In the context of the International GNSS Service (IGS), several IGS Ionosphere Associated Analysis Centers have developed different techniques to provide global ionospheric maps (GIMs) of vertical total electron content (VTEC) since 1998. In this paper we present a comparison of the performances of all the GIMs created in the frame of IGS. Indeed we compare theclassicalones (for the ionospheric analysis centers CODE, ESA/ESOC, JPL and UPC) with the new ones (NRCAN, CAS, WHU). To assess the quality of them in fair and completely independent ways, two assessment methods are used: a direct comparison to altimeter data (VTEC-altimeter) and to the difference of slant total electron content (STEC) observed in independent ground reference stations (dSTEC-GPS). The main conclusion of this study, performed during one solar cycle, is the consistency of the results between so many different GIM techniques and implementations.