Results 11 to 20 of about 1,255 (307)
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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Spatial and Seasonal Estimation of Tropospheric Radio Refractivity in Nigeria
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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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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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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ICT Express, 2022 This article uses radiosonde data of balloons in Hanoi to determine the radio refractive index and the conditions of radio wave propagation in the atmosphere.
Chi Cong Pham, Xuan Anh Nguyen
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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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Applied Sciences, 2021 This article proposes a method for the prediction of wide range two-dimensional refractivity for synthetic aperture radar (SAR) applications, using an inverse distance weighted (IDW) interpolation of high-altitude radio refractivity data from multiple ...
Sungsik Wang +4 more
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Tropospheric Refractivity Profile Estimation by GNSS Measurement at China Big-Triangle Points
Atmosphere, 2021 Atmospheric radio refractivity has an obvious influence on the signal transmission path and communication group delay effect. The uncertainty of water vapor distribution is the main reason for the large error of tropospheric refractive index modeling ...
Xiang Dong +5 more
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Diurnal changes of radio refraction [PDF]
Symposium - International Astronomical Union, 1979 Pathlength variations due to refraction changes in the troposphere may impose a severe limitation to VLB experiments (like random clock drifts). In connection with a VLB experiment Moran and Penfield (1976) analysed surface values of water vapor density, data of several hundred radiosonde launches and of measurements of sky brightness near the water ...
openaire +1 more source