Vol. 4, Issue 10, Part C (2018)

Abstract
Nigeria has a tropical and equatorial region, which is characterized by dominant rainfall. Rain is the major attenuation factor of various communication signal of f > 10 GHz. Therefore, for efficient utilization of the microwave bandwidth during rainfall, it is necessary to determine the relationship between this attenuation effect and the bandwidth at various rainfall rate and frequencies at a particular location of interest. Thus, using propagation modelling, we investigated simultaneously the point rainfall and effects of rain for frequencies between 11 and 40 GHz (i.e. Ku, and Ka) for fixed satellite communication service on earth-space path at three (3) stations (Imo, Osun and Niger) in Nigeria by using rainfall data for the period of six (6) years (January 2011 to December 2016).