Evaluation of daily tropospheric radio refractivity, refractivity gradient and geoclimatic factor over Otukpo, Benue State, Nigeria. Afr. Sci. Rep. [Internet]. 2026 Sep. 8 [cited 2026 Sep. 9];5(3):561. Available from: https://asr.nsps.org.ng/index.php/asr/article/view/561