Local Ionospheric Modeling Using the Localized Global Ionospheric Map and Terrestrial GPS

• Autorzy: Sharifi M. A. , Farzaneh S.

Identyfikatory

DOI

10.1515/acgeo-2015-0065

• Języki publikacji: EN

Abstrakty

EN

Global ionosphere maps are generated on a daily basis at CODE using data from about 200 GPS/GLONASS sites of the IGS and other institutions. The vertical total electron content is modeled in a solargeomagnetic reference frame using a spherical harmonics expansion up to degree and order 15. The spherical Slepian basis is a set of bandlimited functions which have the majority of their energy concentrated by optimization inside an arbitrarily defined region, yet remain orthogonal within the spatial region of interest. Hence, they are suitable for decomposing the spherical harmonic models into the portions that have significant strength only in the selected areas. In this study, the converted spherical harmonics to the Slepian bases were updated by the terrestrial GPS observations by use of the least-squares estimation with weighted parameters for local ionospheric modeling. Validations show that the approach adopted in this study is highly capable of yielding reliable results.

Słowa kluczowe

EN

spherical harmonics; ionospheric modelling; spherical Slepian function

PL

harmoniki sferyczne; modelowanie jonosferyczne

• Wydawca: Instytut Geofizyki PAN ; Springer
• Czasopismo: Acta Geophysica
• Rocznik: 2016
• Tom: Vol. 64, no. 1
• Strony: 237--252
• Opis fizyczny: Bibliogr. 42 poz.

Twórcy

autor

Sharifi M. A.

• School of Surveying and Geospatial Engineering, College of Engineering, University of Tehran, Tehran, Iran
• Research Institute of Geoinformation Technology (RIGT), College of Engineering, University of Tehran, Tehran, Iran

autor

Farzaneh S.

• School of Surveying and Geospatial Engineering, College of Engineering, University of Tehran, Tehran, Iran

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