Table 6: Validation of the three variable correlation radio refractivity model for osogbo under different statistical tests.

Models R2 MBE RMSE MPE NSE IA
Eqn.18a 100.0 1.1635 1.1940 -0.3238 99.9988 99.9997
Eqn.18b 98.8 1.9757 2.3946 -0.5515 99.9951 99.9988
Eqn.18c 57.1 -8.7751 11.9299 2.3927 99.8795 99.9691
Eqn.18d 100.0 -0.2913 0.3869 0.0811 99.9999 100.00