Table 9: Validation of the recommended radio refractivity models for osogbo under different statistical test.

Models	R2	MBE	RMSE	MPE	NSE	IA
Eqn.16c	94.6	-0.0426	2.8806	0.0058	99.9930	99.9982
Eqn.17d	100.0	0.4177	0.4988	-0.1162	99.9998	99.9999
Eqn.17f	98.8	0.1343	1.3719	-0.0385	99.9984	99.9996
Eqn.18d	100.0	-0.2913	0.3869	0.0811	99.9999	100.0000
Eqn.19	100.0	0.4422	0.5113	-0.1237	99.9998	99.9999