Variation of Metrological Parameters as They Affect the Tropospheric Radio Refractivity for Akure South-West Nigeria

Authors: Famoriji J.Oluwole

Abstract:

This research work examines the effect of variations of metrological parameters on the tropospheric radio refractivity during dry and raining seasons for Akure in 2013. The daily averages of radio refractivity during dry (January) and raining (August) seasons were calculated from the data obtained from the Nigeria Metrological Agency (NIMET). The data that was used for the computation of radio refractivity is a daily interval of the variations of metrological parameters for each day in the troposphere for Akure. Consequently, the daily averages of radio refractivity during raining season (August) were greater than the results in dry season (January) as a result of the variations in meteorological parameters such as temperature, humidity and atmospheric pressure in the lower troposphere.

Keywords: Troposphere, Radio refractivity, Akure, Meteorological parameters.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1335792

References:

[1] M. Grabner and V. Kvicera, (2008).Radio Engineering 12, No.4, 50.
[2] Adediji .T.A and Ajewole. M.O. (2008). Vertical Profile of Radio Refractivity in Akure south-West Nigeria, Vol. 4, p 157-168.
[3] Freeman R. L. (2007). Radio System Design for Telecommunications. – Hoboken, New Jersey, John Wiley&SonsInc Pb, p 880.
[4] Valma E., Tamošiūnaitė M., and TamošiūTamošiūnienė M., Žilinskas M. nas S. (2010). Determination of radio refractive index using meteorological data Electronics and Electrical Engineering. – Kaunas: Technologija,.– No. 10 (106). – P. 125–128.
[5] Priestley, J. T and Hill R. J. (1985) Measuring High–Frequency Refractive Index in the Surface Layer Journal of Atmospheric and Oceanic Technology, Vol. 2. – No.2. – P. 233–251.
[6] Falodun S. E., Ajewole M. O. (2006). Radio refractive index in the lowest 100–m layer of the troposphere in Akure, South Western Nigeria Journal of Atmospheric and Solar–Terrestrial Physics, Vol. 68.– No. 2. – P. 236–243.
[7] Willoughby A. A., Aro T. O., Owolabi I. E. (2002). Seasonal variations of radio refractivity gradients in Nigeria Journal of Atmospheric and Solar– Terrestrial Physics.Vol. 64. – P. 417–425
[8] GuanjunGuo, Shukai Li. (2000). Study on the vertical profile of refractive index in the troposphere International Journal of Infrared and Millimeter Waves, Vol. 21. No.7. – P. 1103–1112.