Computer Science – Performance
Scientific paper
Jun 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009adspr..43.1638m&link_type=abstract
Advances in Space Research, Volume 43, Issue 11, p. 1638-1643.
Computer Science
Performance
1
Scientific paper
The aim of this paper is to investigate various aspects of the International Reference Ionosphere (IRI) performance in European area and to evaluate its accuracy and efficiency for: long term prediction of the critical frequencies foF2 and the maximum usable frequencies (MUF); using storm-time correction option (ST); the total electron content (TEC) and the maximum observable frequency (MOF) updating. Data of foF2, TEC, MOF are related to 2005. It is obtained that median values of foF2 can be predicted with the mean error σ(med)˜ 0.49 MHz. For median values of MUF absolute σ was 1.39 MHz and relative σr was 8.8%. For instanteneous values estimates are increased to 1.58σ(med) MHz for foF2 and could reach 3.84 MHz for MUF. Using correction ST-option and TEC values provided ˜30% improvement but TEC seems to be more preferable. However, from considered parameters of the IRI updating (ST-factor, TEC, MOF) the best results were demonstrated by MOF. Using the IRI2007 to calculate TEC gives 20-50% improvement of TEC correspondence to experimental values but this improvement is not enough to treat TEC without the IRI model adaptation.
Maltseva O. A.
Poltavsky O. S.
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