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Spatial and Seasonal Estimation of Tropospheric Radio Refractivity in Nigeria [PDF]
African Scientific Reports, 2022 The spatial and seasonal variation of tropospheric radio refractivity of Nigeria has been studied using meteorological variables (temperature, relative humidity and pressure) retrieved from the archive of the United States’ National Aeronautics for ...
M. M. Tanko +3 more
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A modified artificial neural network based prediction technique for tropospheric radio refractivity. [PDF]
PLoS ONE, 2018 Radio refractivity plays a significant role in the development and design of radio systems for attaining the best level of performance. Refractivity in the troposphere is one of the features affecting electromagnetic waves, and hence the communication ...
Shumaila Javeed +4 more
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Scientific African, 2021 Radio refractivity, which is the bending of a radio signal as it propagates through media, is very important in works involving terrestrial atmospheric electromagnetic propagation such as point-to-point microwave communication, terrestrial radio and ...
O.J. Abimbola +5 more
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Comparative study on Radio Refractivity Gradient in the troposphere using Chaotic Quantifiers [PDF]
Heliyon, 2019 Complexity and nonlinear trend in the internal activities of the troposphere has been a great factor affecting the transmission and receiving of good quality of signals globally.
J.S. Ojo, A.O. Adelakun, O.V. Edward
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UMYU Scientifica JournalRadio refractivity is the ratio of the velocity of radio waves in a specific medium to that in free space. Radio waves propagate according to variations in tropospheric radio refractive index.
Gazali Bello +3 more
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Estimation of refractivity uncertainties and vertical error correlations in collocated radio occultations, radiosondes, and model forecasts [PDF]
Atmospheric Measurement Techniques, 2022 Random uncertainties and vertical error correlations are estimated for three independent data sets. The three collocated data sets are (1) refractivity profiles of radio occultation measurements retrieved from the Metop-A and B and COSMIC-1 missions, (2)
J. K. Nielsen +3 more
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Study of Seasonal Surface Refractivity over NorthCentral Nigeria [PDF]
Physics Access, 2021 Tropospheric radio wave signals experience loss due to multipath effect, scattering and other forms of attenuation through the atmospheric medium, primarily due to variations in weather conditions with time.
Muhammad B Ladan +8 more
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Diurnal Variation of Surface Radio Refractivity over Sokoto, North-western Nigeria [PDF]
Physics Access, 2021 The knowledge of good refractivity profile is vital for proper planning of terrestrial communication links; surface refractivity profile of a station is particularly required for enhanced planning and prediction of performance of terrestrial radio links ...
Mohammed Z Doko +6 more
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Development and evaluation of airborne microwave refractometer for studies on atmospheric tropical boundary layer radiorefractive index [PDF]
Annales Geophysicae, 1994 Observations of high-resolution data on radio refractivity were obtained by the airborne microwave refractometer over the Indian sub-continent (a tropical country) from 1971 to 1988. Detailed vertical and horizontal distributions of radio refractivity
S. B. S. S. Sarma, B. M. Reddy
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IEEE Access, 2020 The meteorological parameters review the impact of refractivity on received signal strength for the one-fourth kilometre square area is confer for frequency 1800 to 1900 MHz.
Sayyed Shahid Hussain +5 more
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