Empirical Model for Estimating Global Solar Radiation on Horizontal Surfaces for Selected Cities in the Six Geopolitical Zones in Nigeria

Figure 3

Comparison of the estimated and observed monthly mean horizontal global solar radiation data: (a) Abuja, (b) Benin City, (c) Katsina, (d) Lagos, (e) Nsukka, and (f) Yola.

(a)

(b)

(c)

(d)

(e)

(f)