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Global validation of IRI TEC for high and medium solar activity conditions |
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| Authors: | P Coïsson SM Radicella L Ciraolo R Leitinger B Nava |
| Institution: | 1. Aeronomy and Radiopropagation Laboratory, The Abdus Salam International Centre for Theoretical Physics, Strada Costiera 11, 34014 Trieste, Italy;2. Istituto di Fisica Applicata Carrara, Consiglio Nazionale delle Ricerche, Via Madonna del piano 10, 50019 Sesto Fiorentino, FI, Italy;3. Institut fuer Geophysik, Astrophysik und Meteorologie, Universitaet Graz, Halbärtgasse 1, A-8010 Graz, Austria |
| Abstract: | The IRI model offers a choice of options for the computation of the electron density profile and electron content (TEC). Recently new options for the topside electron density profile have been developed, which have a strong impact on TEC. Therefore it is important to test massively the IRI and the new options with experimental data. A large number of permanent stations record dual frequency GPS data from which it is possible to obtain TEC values. Thirty-one worldwide distributed stations have been selected to investigate the capabilities of the IRI to reproduce experimental TEC. Data for years 2000 (high solar activity) and 2004 (medium solar activity) have been analyzed computing modeled values with the IRI-2001 and the IRI-2007-NeQuick topside options. It is found that IRI-2007-NeQuick option generally improves the estimate of the slant TEC, especially in the case of high latitudes stations during high solar activity. |
| Keywords: | Ionospheric modeling Topside region Equatorial ionosphere Mid-latitude ionosphere High latitude ionosphere |
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