Generating a 3D TEC Model for Australia with Combined LEO Satellite and ground base GPS Data

Gary Ouyang, Jian Wang, Jinling Wang, and David Cole

Abstract:	Characteristics of temporal variations of ionospheric TEC (Total Electron Content) play an important role, in GPS (Global Positioning System) static, kinematic and navigation application, especially in the derivation of high precision ionospheric corrections for position. There are many models advanced by researchers for modeling these characteristics. But most of them are 2 dimensional space ionospheric models, they only consider latitude and longitude as variables. In this paper, we present a near real-time 3 dimensional TEC calculation method in which latitude, longitude, altitude and time are treated as the parameters. In the following sections, four topics are discussed: Firstly, generating vertical electron density distribution function by LEO (Low Earth Orbit) RO (Radio Occultation) data; Secondly, calculating “less bias” VTEC (vertical TEC) value by carrier phase smoothing pseudo ranges using Kalman filter method and “no bias” TEC linear model assumption method; Thirdly, the VTEC response to different heights formed by using TEC vertical distribution profile as a proportion rate, and Fourthly, some initial experiment results.
Published in:	Proceedings of the 20th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2007) September 25 - 28, 2007 Fort Worth Convention Center Fort Worth, TX
Pages:	2285 - 2290
Cite this article:	Ouyang, Gary, Wang, Jian, Wang, Jinling, Cole, David, "Generating a 3D TEC Model for Australia with Combined LEO Satellite and ground base GPS Data," Proceedings of the 20th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2007), Fort Worth, TX, September 2007, pp. 2285-2290.
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