Status of CAS global ionospheric maps after the maximum of solar cycle 24
-
Published:2021-09-06
Issue:1
Volume:2
Page:
-
ISSN:2662-1363
-
Container-title:Satellite Navigation
-
language:en
-
Short-container-title:Satell Navig
Author:
Li Zishen,Wang Ningbo,Liu Ang,Yuan Yunbin,Wang Liang,Hernández-Pajares Manuel,Krankowski Andrzej,Yuan Hong
Abstract
AbstractAs a new Ionosphere Associate Analysis Center (IAAC) of the International GNSS Service (IGS), Chinese Academy of Sciences (CAS) started the routine computation of the real-time, rapid, and final Global Ionospheric Maps (GIMs) in 2015. The method for the generation of CAS rapid and final GIMs and recent updates are presented in the paper. The quality of CAS post-processed GIMs is assessed during 2015–2018 after the maximum of solar cycle 24. To perform an independent and fair assessment, Jason-2/3 Vertical Total Electron Contents (VTEC) are first used as the references over the ocean. GPS differential Slant TECs (dSTEC) generated from 55 Multi-GNSS Experimental (MGEX) stations of the IGS are also employed, which provides a complementing way to evaluate the ability of electron content models to reproduce the spatial and temporal gradients in the ionosphere. During the test period, Jet Propulsion Laboratory (JPL) GIMs present significantly positive deviations compared to the Jason VTEC and GPS dSTEC. Technical University of Catalonia (UPC) rapid GIM UQRG exhibits the best performance in both Jason VTEC and GPS dSTEC analysis. The CAS GIMs show comparable performance with the results of the first four IAACs of the IGS. As expected, the poor performance of all GIMs is in equatorial regions and the high latitudes of the southern hemisphere. The consideration of generating multi-layer or three-dimensional ionospheric maps is emphasized to mitigate the inadequacy of ionospheric single-layer assumption in the presence of pronounced latitudinal gradients. The use of ionospheric observations from the new GNSS constellations and other space- or ground-based observation techniques is also suggested in the generation of future GIMs, given the sparse GPS/GLONASS stations in the southern hemisphere.
Funder
National Key Research Program of China Alliance of International Science Organizations National Natural Science Foundation of China Ministry of Science and Higher Education, Poland National Centre for Research and Development, Poland Scientific Instrument Developing Project of the Chinese Academy of Sciences
Publisher
Springer Science and Business Media LLC
Reference54 articles.
1. Azpilicueta, F., & Brunini, C. (2008). Analysis of the bias between TOPEX and GPS vTEC determinations. Journal of Geodesy, 83(2), 121–127. 2. Afraimovich, E. L., Astafyeva, E. I., Demyanov, V. V., Edemskiy, I. K., Gavrilyuk, N. S., Ishin, A. B., Kosogorov, E. A., Leonovich, L. A., Lesyuta, O. S., & Palamartchouk, K. S. (2013). A review of GPS/GLONASS studies of the ionospheric response to natural and anthropogenic processes and phenomena. Journal of Space Weather and Space Climate, 3, A27. 3. Berdermann, J., Kriegel, M., Banyś, D., Heymann, F., Hoque, M., Wilken, V., Borries, C., Heßelbarth, A., & Jakowski, N. (2018). Ionospheric response to the X9. 3 flare on 6 September 2017 and its implication for navigation services over Europe. Space Weather, 16(10), 1604–1615. 4. Bergeot, N., Chevalier, J.-M., Bruyninx, C., Pottiaux, E., Aerts, W., Baire, Q., Legrand, J., Defraigne, P., & Huang. (2014). Near real-time ionospheric monitoring over Europe at the Royal Observatory of Belgium using GNSS data. J Space Weather Space Clim, 4, A31. 5. Ciraolo, L., Azpilicueta, F., Brunini, C., Meza, A., & Radicella, S. (2007). Calibration errors on experimental slant total electron content (TEC) determined with GPS. Journal of Geodesy, 81(2), 111–120.
Cited by
32 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献
|
|