Latitudinal effect on Total Electron Content variations

This work focuses on the latitudinal effect on the ionospheric parameters, in particular the Total Electron Content (TEC). Data of two IGS stations at Libreville, Gabon (9.6721°E, 0.3539°N), and at Ny-Alesund, Norway (11.8653°E, 78.9296°N) during February 2008 and July 2008 were analysed. It is found that hourly vertical TEC is higher at low latitude station than at high latitude station. TEC is also higher at Libreville in February 2008 than in July 2008 with the average difference of 5.908 TECU. However the difference between these months is less pronounced for Nya-Alesund with only 0.835 TECU difference. In addition, the diurnal variations of TEC are evident for both stations, especially for low latitude station. The findings show that TEC varies depending on the latitudes.