On the time of minimum ionization in the F2 region

Using measurements of the critical frequency of F2 region (f oF2) the validity of the International Reference Ionosphere model to predict the time of minimum ionization is checked. Data obtained at different ionospheric stations have been considered. The CCIR and URSI options are used to model calcu...

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Bibliographic Details
Published in:Advances in space research 2008-08, Vol.42 (4), p.659-665
Main Authors: Ezquer, R.G., Cabrera, M.A., Mosert, M., Radicella, S.M., Orué, Y. Migoya
Format: Article
Language:English
Subjects:
Astronomy
Critical frequency
Earth, ocean, space
Exact sciences and technology
External geophysics
F2 region
Ionosphere
Ionospheric model
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Summary:Using measurements of the critical frequency of F2 region (f oF2) the validity of the International Reference Ionosphere model to predict the time of minimum ionization is checked. Data obtained at different ionospheric stations have been considered. The CCIR and URSI options are used to model calculations. For CCIR option the results show that good predictions were obtained for about 40% of the considered cases. For the rest of the considered data, the model predicts the minimum at times earlier than that observed in the measurements. The percentages of good predictions obtained with URSI option are lower than those corresponding to CCIR one.
ISSN:0273-1177
1879-1948
DOI:10.1016/j.asr.2007.07.049