Response of TEC to Various Solar Activity Levels in Africa

The total electron content (TEC) variability for three levels of solar activities; high solar active period (HSP; year 2000) moderate solar active period (MSP; year 2004) and low solar active period (LSP; year 2008) over middle and low latitudes of Africa were investigated. We have studied the day-to-day monthly mean seasonal relative standard deviation (SVR) and yearly mean changes. As expected for the middle (Sutherland) and low (Libreville) latitudes TEC variability was observed to be highest during HSP and higher in MSP compared to LSP. Comparing TEC variability between Sutherland and Libreville in each phase the TEC magnitudes in each phase of the solar levels is always higher in Libreville compared to Sutherland during daytime hours.