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http://dx.doi.org/10.1051/swsc/2012019

has been cited by the following article:

• TITLE: Statistical Study of foF2 Diurnal Variation at Dakar Station from 1971 to 1996: Effect of Geomagnetic Classes of Activity on Seasonal Variation at Solar Minimum and Maximum

  AUTHORS: Ali Mahamat Nour, Ouattara Frédéric, Zerbo Jean Louis, Gyébré Aristide Marie Frédéric, Nanéma Emmanuel, Zougmoré François

  KEYWORDS: foF2 Diurnal Variation, Solar Cycle Phases, Geomagnetic Activity Classes, Seasonal Effects, E Region Electric Currents

  JOURNAL NAME: International Journal of Geosciences, Vol.6 No.3, March 11, 2015

  ABSTRACT: The statistical study of F2 layer critical frequency at Dakar station from 1971 to 1996 is carried out. This paper shows foF2 statistical diurnal for all geomagnetic activities and all seasons and that during solar maximum and minimum phases. It emerges that foF2 diurnal variation graphs at Dakar station exhibits the different types of foF2 profiles in African EIA regions. The type of profile depends on solar activity, season and solar phase. During solar minimum and under quiet time condition, data showthe signature of a strength electrojet that is coupled with intense counter electrojet in the afternoon. Under disturbed conditions,mean intense electrojet is observed in winterduring fluctuating and recurrent activities. Intense counter electrojet is seen under fluctuating and shock activities in all seasons coupled with strength electrojet in autumn. In summerand spring under all geomagnetic activity condition, there is intense counter electrojet. During solar maximum, in summer and spring there is no electrojet under geomagnetic activity conditions.Winter shows a mean intense electrojet. Winter and autumn are marked by the signature of the reversal electric field.