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

Table 1

Results of stochastic analysis on temperature-based linear regression model of (1) along with the geographical locations for selected cities in Nigeria.

Cities	Lat. (^∘N)	Long. (^∘E)	Empirical constants			CC (%)	CD (%)	MBE	RMSE	TS
			𝑚0	𝑚1	𝑚2
Abuja	9.08	7.53	−1.2560	0.3815	0.05440	95.7	91.6	−0.0109	0.2648	0.1370
Benin City	6.34	5.63	0.2284	−1.0960	0.03981	97.6	95.2	0.0023	0.1632	0.0473
Katsina	13.00	7.60	0.5033	−0.2487	0.00932	89.9	80.9	−0.0024	0.2685	0.0295
Lagos	6.45	3.40	2.6500	−3.0010	0.01945	94.6	89.5	−0.0364	0.2216	0.5527
Nsukka	6.86	7.39	0.2445	−0.8525	0.03240	94.9	90.1	−0.0047	0.2016	0.0780
Yola	10.38	12.87	0.6187	−0.4966	0.01031	93.5	87.5	0.0429	0.1900	0.7683