Rainfall rate modeling for los radio systems in South Africa

Abstract

The cumulative distributions of rain intensity for 12 locations in South Afi'ica arc presented in this paper based on 5-year rainfall data. The rainl~I11 rate having an integration time of 60 minutes is converted to the ITU-R recommended integration time of I minute for Durban in South Africa.Consequently, values of coeflieients a and b so determined arc used to convert 60-minute into 1minute rain rates 1'01' other regions or South Arrica. The resulting cumulative rain intensities arc compared with the l'CIevant ITU-R Recommendation PX37. Based on this, an additional three rain zones arc determined alongside the live ITU-R I'ain zones Illr South Africa.