Development of one-minute rain-rate and rain-attenuation contour maps for satellite propagation system planning in a subtropical country: South Africa

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Development of one-minute rain-rate and rain-attenuation contour maps for satellite propagation system planning in a subtropical country: South Africa

Ojo, J.S. / Owolawi, P.A.

Highlights • One-minute rain-rate and rain-attenuation maps for a subtropical region (South Africa) are presented. • The Kriging interpolation method was used for the spatial interpolation of rain and attenuation values. • Results will be useful to determine the appropriate effective isotropically radiated power and receiver characteristics.

Abstract Millimeter and microwave system design at higher frequencies require as input a 1-min rain-rate cumulative distribution function for estimating the level of degradation that can be encountered at such frequency bands. Owing to the lack of 1-min rain-rate data in South Africa and the availability of 5-min and hourly rainfall data, we have used rain-rate conversion models and the refined Moupfouma model to convert the available data into 1-min rain-rate statistics. The attenuation caused by these rain rates was predicted using the International Telecommunication Union (ITU) recommendations model. The Kriging interpolation method was used to draw contour maps over different percentages of time for spatial interpolation of rain-rate values into a regular grid in order to obtain a highly consistent and predictable inter-gauge rain-rate variation over South Africa. The present results will be useful for system designers of modern broadband wireless access (BWA) and high-density cell-based Ku/Ka, Q/V band satellite systems, over the desired area of coverage in order to determine the appropriate effective isotropically radiated power (EIRP) and receiver characteristics of this region.

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Document information

Title :

Development of one-minute rain-rate and rain-attenuation contour maps for satellite propagation system planning in a subtropical country: South Africa

Contributors:

Ojo, J.S. (author) / Owolawi, P.A. (author)

Published in:

Advances in Space Research ; 54 , 8 ; 1487-1501

Publication date :

2014-06-21

Size :

15 pages

ISSN :

0273-1177

DOI :

https://doi.org/10.1016/j.asr.2014.06.028