Abstract
In this study, atmospheric variables such as air temperature, relative humidity and atmospheric pressure were evaluated in order to determine the atmospheric refractivity over Auchi town in Edo State, Nigeria using a portable weather monitoring system. The data revealed that, the average atmospheric refractivity was 354.31 N-units. It was observed that air temperature, relative humidity and atmospheric pressure were having significant influence on the atmospheric refractivity during all the months in 2017. This influence was much during the months with higher rainfall (wet season), than the months with lesser rainfall (dry season). The air temperature was having the higher influence compared to that of the relative humidity and the atmospheric pressure. This study will assist the management of radio communication systems for enhancement and improvement purposes.Keywords: Refractivity; Troposphere; Propagation; Variation; Weather Variables
Highlights
The electromagnetic waves that are propagated in the lower atmosphere are mainly influenced by the different components that made up the atmosphere, as a result of the variations of the some major atmospheric weather variables which includes; atmospheric temperature, atmospheric pressure and relative humidity in the troposphere (Korak, 2003; Agbo, et al, 2013; Ukhurebor and Azi, 2018)
Refractivity variation studies are relevant in telecommunication network, navigation and surveillance systems in order to mitigate with the problems that may occur as a result of anomalous radio wave propagation and unpredicted path loss that affects the performance of these systems (Ukhurebor and Azi, 2018)
The measured weather variables were used to calculate the atmospheric refractivity variation and seasonal transaction characteristics over Auchi area, SouthSouth, Nigeria and the results would be useful to the management of radio communication systems for enhancement and improvement purposes
Summary
The electromagnetic waves that are propagated in the lower atmosphere (troposphere) are mainly influenced by the different components that made up the atmosphere, as a result of the variations of the some major atmospheric weather variables which includes; atmospheric temperature, atmospheric pressure and relative humidity in the troposphere (Korak, 2003; Agbo, et al, 2013; Ukhurebor and Azi, 2018). Refractivity variation studies are relevant in telecommunication network, navigation and surveillance systems in order to mitigate with the problems that may occur as a result of anomalous radio wave propagation and unpredicted path loss that affects the performance of these systems (Ukhurebor and Azi, 2018) These unpredicted radio wave propagations can cause intense effects to the extent of complete breakdown of communication between the transmitters and the receivers or even make radar to completely miss its intended target (Alam, et al, 2016; Ukhurebor and Azi, 2018). The measured weather variables were used to calculate the atmospheric refractivity variation and seasonal transaction characteristics over Auchi area, SouthSouth, Nigeria and the results would be useful to the management of radio communication systems for enhancement and improvement purposes
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