Workshop Program
Register now
Workshop Program

Contribution of solar wind parameters on the variation of ionospheric activity on the african equatorial zone
by Dr. jean Bienvenu DINGA, Mr. Jocelyn Franck-Patient BOUNGOU POATY


Total ionosphere electronic content was determined from Rinex, CODG, DCB and YUMA files provided by ground receiving stations (adis (Ethiopia), bjco (Benin), mbar (Uganda), nklg (Gabon) ), signals from satellites. These files were used to plot the local TEC Rinex and global TEC CODG curves during geomagnetically calm days of the year 2014 (08-09 March as well as 18-19 July), as well as the analysis parameters of the solar wind (interplanetary magnetic and electricalfields, disturbance during solar storm (Dst), speed, temperature, pressure, proton densityof the wind) to examine their contribution to the variation of ionospheric activity. The results were used to interpret the monthly and annual variations of the TEC. The TEC curves of the stations show a marked diurnal variation with maximums between 12 am and 4 pm UTC and minimums between 0 am-4 am and 8 pm-midnight. In March, these maxima are significantly pronounced than those in July. In March, there are small maximums on the TEC curves at night and in the evening and very early hours that cannot be explained by the sun. They are due in this equatorial zone in particular to the fountain effect by which the electric field ionizes the E layer of the ionosphere. This effect would be triggered by the combination of certain parameters of the solar wind. Indeed, the pressure variation within the solar wind seems to be the cause of the variation in speed and temperature. Therefore, the parameters of the solar wind have an significant influence on observed ionospheric activity variation. Keywords: equatorial ionosphere, Total electronic content, solar wind parameters, fountain effect.


Open in a new tab

Topic : Theme 1: Atmospheric Chemistry and Physics.
Reference : T1-A46

Back to the list of submissions
Previous submission · Next submission


Comments are only accessible to participants. If you are a participant, please log in to see them.