Empirical Models for Estimating Global Solar Radiation over the Ashanti Region of Ghana

Table 4

Summary of the model evaluations using air temperature.

Author	𝑅	𝑅^2	MBE (MJ m^−2 day^−1)	MPE (%)	RMSE (MJ m^−2 day^−1)
Proposed	0.9126	0.8328	−0.2973	1.7075	0.9859
Hargreaves and Samani (1982) [14]	0.8822	0.7782	1.1709	−6.7255	3.8835
Chandel et al. (2005) [13]	0.9149	0.8370	0.9409	−5.4044	3.1206