Case Study of Secondary Radioclimatic Variables on Radio Signals at the Troposhere in Nsukka, Nigeria

P. E. Okpani | P. A. Nwofe ^[3] | N. O. Chukwu

Abstract: In the present study, the effect of secondary Radioclimatic variables on radio signals at the troposphere in Nsukka, Nigeria was investigated. It is generally known that for a reasonable prediction for radioclimatic study to be made, a reliable radio propagation data which could be primary or secondary is required. The secondary data can be estimated from a relevant primary data which include, temperature, pressure, humidity and water vapour pressure. The effect of the secondary radioclimatic data, refractivity (N), and refractive index (n) in the study area indicate that the values of the radio refractivity and refractive index were increased. The result also, show that the k-factor (effective earths radius) values for the months (August 2013 July 2014) were at the range of 1.555 1.653, which is above the global standard value of 1.333. These values strongly suggest that super-refraction effects are possible in the study area, leading to possible distortion of wireless communication signals.

Keywords: troposphere, Radioclimatic variables, , surface refractivity, k-factor, Nsukka

Edition: Volume 4 Issue 7, July 2015,

Pages: 2009 - 2013