Local Models in Ionosphere VTEC Estimation Based on GNSS Regression Models

Seigo Fujita, Hiroaki Yamamoto, Yukihiro Kubo, Sueo Sugimoto

Abstract:	In [1–3], we have preliminary developed a method of esti- mating the local models of an ionosphere VTEC (Vertical Total Electron Content) based on GNSS regression models (abbreviated by GR models) and have shown the ionospheric delay (or advance) in the sky over Japan using the Gps Earth Observation NETwork (GEONET) data provided from the Geographical Survey Institute (GSI) of Japan [4]. In this paper, we complete to refine the method of estimating the local models with power series for VTEC at the ionospheric pierce points in the ionospheric single model. Furthermore from the aspect of model fitting, we discuss the best num- ber of powers in 2-Dimensional(2D) Taylor series for the local model of VTEC from informational theoretical points of views such as AIC [5] and BIC [6].
Published in:	Proceedings of the 21st International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2008) September 16 - 19, 2008 Savannah International Convention Center Savannah, GA
Pages:	2377 - 2389
Cite this article:	Fujita, Seigo, Yamamoto, Hiroaki, Kubo, Yukihiro, Sugimoto, Sueo, "Local Models in Ionosphere VTEC Estimation Based on GNSS Regression Models," Proceedings of the 21st International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2008), Savannah, GA, September 2008, pp. 2377-2389.
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