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PIER PIER B PIER C PIER M PIER Letters
2011-01-11
Rainfall Rate Probability Density Evaluation and Mapping for the Estimation of Rain Attenuation in South Africa and Surrounding Islands
By
Pius Adewale Owolawi

    Dr. Pius Adewale Owolawi

    Department of Electrical Engineering

    Mangosuthu University of Technology

    South Africa

    Homepage

Progress In Electromagnetics Research, Vol. 112, 155-181, 2011
doi:10.2528/PIER10082504
Abstract
The paper describes the modelling of the average rainfall rate distribution measured at different locations in South Africa. There are three major aspects this paper addresses: to develop a rainfall rate model based on the maximum likelihood method (ML); to develop contour maps based on rainfall rate at 0.01% percentage of exceedence; and re-classification of the ITU-R and Crane rain zones for the Southern Africa region. The work presented is based on five-minute rainfall data converted to one-minute equivalent using a newly proposed hybrid method. The results are mapped and compared with conventional models such as the ITU-R model, Rice-Holmberg, Moupfouma and Crane models. The proposed rainfall rate models are compared and evaluated using root mean square and chi-square (χ2) statistics. Then re-classification of the rain zone using ITU-R and Crane designations is suggested for easy integration with existing radio planning tools. The rainfall rate contour maps at 0.01% percentage of exceedence are then developed for South Africa and its surrounding islands.
Citation
Pius Adewale Owolawi, "Rainfall Rate Probability Density Evaluation and Mapping for the Estimation of Rain Attenuation in South Africa and Surrounding Islands," Progress In Electromagnetics Research, Vol. 112, 155-181, 2011.
doi:10.2528/PIER10082504
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