Consistency of seven different GNSS global ionospheric mapping techniques during one solar cycle |
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| Authors: | " target="_blank">David Roma-Dollase Manuel Hernández-Pajares Andrzej Krankowski Kacper Kotulak Reza Ghoddousi-Fard Yunbin Yuan Zishen Li Hongping Zhang Chuang Shi Cheng Wang Joachim Feltens Panagiotis Vergados Attila Komjathy Stefan Schaer Alberto García-Rigo " target="_blank">José M Gómez-Cama |
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| Institution: | 1.Universitat Politècnica de Catalunya (UPC-IonSAT, IEEC),Barcelona,Spain;2.Department of Engineering: Electronics,Universitat de Barcelona,Barcelona,Spain;3.Space Radio-Diagnostics Research Center (SRRC/UWM),University of Warmia and Mazury in Olsztyn,Olsztyn,Poland;4.Canadian Geodetic Survey,Natural Resources Canada,Ottawa,Canada;5.Institude of Geology and Geophysics,Chinese Academy of Sciences,Beijing,China;6.Academy of Opto-Electronics,Chinese Academy of Sciences,Beijing,China;7.Wuhan University,Wuhan,China;8.Navigation Support Office,Telespazio VEGA Deutschland GmbH c/o European Space Agency/European Space Operations Centre,Darmstadt,Germany;9.Jet Propulsion Laboratory,National Aeronautics and Space Administration,Washington,USA;10.Center for Orbit Determination in Europe,Bern,Switzerland |
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| Abstract: | 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 the classical ones (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. |
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