Global modeling 2~(nd)-order ionospheric delay and its effects on GNSS precise positioning |
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| Authors: | ZHANG HongPing LV HaiXia LI Min & SHI Chuang State Key Laboratory of Information Engineering in Surveying Mapping Remote Sensing Wuhan University Wuhan China GNSS Research Center Wuhan School of Geodesy Geomatics |
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| Institution: | ZHANG HongPing 1,2,LV HaiXia 3,LI Min 2 & SHI Chuang 1,2 1 State Key Laboratory of Information Engineering in Surveying,Mapping and Remote Sensing,Wuhan University,Wuhan 430070,China,2 GNSS Research Center,Wuhan 430079,3 School of Geodesy and Geomatics |
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| Abstract: | Ionospheric delay is one of the major error sources in GNSS navigation and positioning.Nowadays,the dual-frequency technique is the most widely used in ionospheric refraction correction.However,dual-frequency measurements can only eliminate the first-order term of ionospheric delay,while the effect of the second-order term on GNSS observations may be several centimeters.In this paper,two models,the International Reference Ionosphere (IRI) 2007 and International Geomagnetic Reference Field (IGRF) 11 are used... |
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| Keywords: | ionospheric delay second-order ionospheric correction GNSS precise positioning |
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