Prediction of Global Solar Radiation in Abu Dhabi

Table 3

Goodness of fit statistics for the used regression models.

Station	Model	R^2	MAPE	MBE	MABE	RMSE	SSR	SST
Abu Dhabi	Linear	94%	1.89	−0.0035	0.1080	0.1330	17.751	18.862
	Quadratic	90%	1.94	0.0094	0.1162	0.1529	16.979	18.863
	Cubic	91%	1.75	0.0006	0.1038	0.1324	17.209	18.861
	Exponential	88%	2.23	0.0370	0.1338	0.1742	16.628	18.878
	Logarithmic	88%	2.39	0.0148	0.1410	0.1777	16.687	18.864
	Linear-logarithmic	87%	3.11	0.0151	0.1799	0.2141	16.449	18.864
	Power	88%	2.52	0.0077	0.1474	0.1825	16.682	18.862
Al Ain	Linear	81%	3.39	−0.1341	0.1751	0.2173	16.328	20.766
	Quadratic	83%	3.15	−0.0068	0.1935	0.2134	16.610	19.919
	Cubic	83%	3.06	0.0016	0.1881	0.2078	16.497	19.918
	Exponential	81%	3.32	0.0053	0.2142	0.2592	16.166	19.919
	Logarithmic	84%	3.45	0.1040	0.2131	0.2332	16.794	20.048
	Linear-logarithmic	83%	3.07	−0.0059	0.1896	0.2104	16.505	19.918
	Power	74%	4.10	0.2658	0.2781	0.3685	15.351	20.766