The influence of primary radio climatology parameters on radio refractive index over the African region: a 30-year satellite study
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Date
2021
Journal Title
Journal ISSN
Volume Title
Publisher
Journal of Physics: Conference Series
Abstract
In the lower part of the atmospheric boundary layer, structure of the radio refractive
index plays a vital role when planning and designing microwave communication link. The
effects of primary radio climatic parameters on radio wave propagation at UHF and microwave
frequencies are crucial in studying radio refractive index. 1951 to 1980 satellite data has been
used to investigate the mean values of both the primary radio climatic variables and surface
radio refractive index over the Africa. The mean value of water vapor pressure, temperature
and pressure ranges from 3-23 mbar, 284-302 K and 800-1000 mbar respectively across
Africa. The high values of water vapor pressure around the Coastal and Rainforest reduce
towards the Savanna and Steppe region (semi-arid). The mean variation value of surface
refractivity over Africa ranges from 160 - 340 N-units. The refractivity values in larger part of
the savanna range between 250 – 280 N-units.
Description
Staff Publication
Keywords
Communication,, Climatic parameter,, Refractivity,, Desert,, Pressure