Tag Archives: Troposphere

A Test of the Relationship between Refractivity and Radio Signal Propagation for Dry Particulates (Review Completed - Accepted)

Radio waves or radio signals propagate through the atmosphere in wireless communication. They are affected mostly by variability in radio refractivity which leads to a decrease in their speed or rate of propagation which eventually cause propagation delay or attenuation in the troposphere. The hourly averages of radio refractivity for dry particulates during dry season (January) were calculated from the data obtained from the Nigeria Meteorological Agency (NIMET) when UHF broadcast signal measurement was taken for each hour throughout the whole day in Akure, Ondo state, Nigeria. However, the statistical correlation (with a correlation coefficient of -0.97) reveals that at different points when the refractivity was high (most especially at night and in the morning when the humidity was high) the signal strength was low and at the points when the refractivity was low (most especially during the day when the humidity was low due to high temperature) the signal strength was higher. Therefore, the higher the refractivity the lesser the signal strength at the point of observation in the troposphere i.e. they are inversely proportional to each other

Keywords: Dry particulates, Radio Signal, Refractivity, Troposphere

Variation of Metrological Parameters As They Affect the Tropospheric Radio Refractivity for Akure South-West Nigeria (Review Completed - Accepted)

This research work examines the effect of variations of meteorological 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 Meteorological Agency (NIMET). The data that was used for the computation of radio refractivity is a daily interval of the variations of meteorological 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: Akure, Meteorological parameters, Radio refractivity, Troposphere