The Constants in the Equation for Atmospheric Refractive Index at Radio Frequencies [PDF]
Proceedings of the IRE, 1953 Recent improvements in microwave techniques have resulted in precise measurements which indicate that the conventional constants K1 = 79°K/mb and K22?=4,800°K in the expression for the refractivity of air, N=(n-1) 106=[K1/T](p+ K2'e/T) should be revised. Various laboratories appear to have arrived at this conclusion independently.
E.K. Smith, S. Weintraub
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Estimation and evaluation of COSMIC radio occultation excess phase using undifferenced measurements [PDF]
Atmospheric Measurement Techniques, 2017 In the GPS radio occultation technique, the atmospheric excess phase (AEP) can be used to derive the refractivity, which is an important quantity in numerical weather prediction.
P. Xia, S. Ye, K. Jiang, D. Chen
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Columnar Radio Refractivity Of The Troposphere At Ashodi And Kano
, 2005 Spatial-temporal, distributions of columnar radio refractive index in the troposphere of two tropical stations – Kano and Oshodi are considered.
B Adeyemi, Adeyemi, B
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Performance Analysis of Tropospheric Radio Refractivity on Radio Field Strength and Radio Horizon Distance and Its Variation with Meteorological Parameters over Osogbo, Nigeria [PDF]
, 2019 Radio refractivity estimation is paramount in the planning and design of radio link/systems for the purpose of achieving optimal performances. In this study, the monthly average daily atmospheric pressure, relative humidity and temperature data obtained ...
Akpootu, D. O. +6 more
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UMYU Scientifica JournalSurface radio refractivity is a crucial parameter in studying radio wave communication as it quantifies the bending of electromagnetic waves by atmospheric factors.
Aminu Yaradua Sabiru +2 more
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The Investigation of Surface Radio Refractivity Over Lokoja, Kogi State Nigeria
UMYU Scientifica JournalThis research investigated the variation of Surface Radio Refractivity and its propagation effects on radio signals over Lokoja, Kogi State, Nigeria. The study used six years (2015-2020) of satellite data on temperature, pressure, relative humidity and ...
Akinbolati, A., Adamu, I., Adache, T. D.
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Tropospheric radio refractivity over three radiosonde stations in Nigeria
, 2005 The annual variations of radio refractivity parameter within the first 10 km of the troposphere are presented for three radiosonde stations in Nigeria, viz: Oshodi, a coastal area in the southwest, Minna, a middle belt Savannah region and Kano, a sub ...
B Adeyemi, Adeyemi, B
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Improving the bias characteristics of the ROPP refractivity and bending angle operators [PDF]
Atmospheric Measurement Techniques, 2014 The bending angle observation operator (forward model) currently used to assimilate radio occultation (RO) data at the Met Office, the European Centre for Medium-Range Weather Forecasts (ECMWF) and other centres is the same as is included in the Radio ...
C. P. Burrows +2 more
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Advanced Functional Materials, EarlyView.Ferroelectric tunnel junction devices based on epitaxial undoped ferroelectric HfO2 films demonstrate stable switching endurance of over 106 switching cycles, low write voltages of ±3 V, 16 measured resistance states, and neuromorphic capability.
Markus Hellenbrand +13 more
wiley +1 more source
Radio Refractivity Study in Akure-Owo Digital Microwave Link in South Western Nigeria [PDF]
, 2015 This work is a study of radio refractivity in Akure-Owo Digital Microwave Link in South Western Nigeria. Meteorological data of air temperature, atmospheric pressure, relative humidity, and water vapour pressure were measured between January and December
Otasowie, PO, Edeko, FO
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