Seasonal, Diurnal, and Solar-Cycle Variations of Electron Density at Two West Africa Equatorial Ionization Anomaly Stations

Table 1

Correlation coefficients between foF2 and sunspot number (𝑅_𝑧) from cycle 20 to cycle 22.

Cycle	20	21	22	Location
foF2 correlation coefficient	0.977	0.973	0.948	Ouagadougou
	0.950	0.883	0.990	Dakar