Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/114422
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Type: Journal article
Title: Modelling radio refractive index in the atmospheric surface layer
Author: Salamon, S.
Hansen, H.
Abbott, D.
Citation: Electronics Letters, 2015; 51(14):1119-1121
Publisher: Institution of Engineering and Technology
Issue Date: 2015
ISSN: 0013-5194
1350-911X
Statement of
Responsibility: 
S.J. Salamon, H.J. Hansen and D. Abbott
Abstract: Knowledge of the refractive index profile at radio frequencies in the surface layer of the atmosphere is required to predict the performance of terrestrial radio systems, and although a constant gradient of refractivity with height is often assumed, both measurements and theory suggest that gradients in the lowest 20 m of the atmosphere may often be greater than those above this level. For the special case of evaporation ducts over water in a neutral atmosphere, a logarithmic refractivity profile is normally assumed, but a general model that includes both this case and the linear profile as special cases is proposed, which may also be used to approximately model stable and unstable surface atmospheres. This new model may be particularly suited to predicting sub-refractive fading.
Rights: © The Institution of Engineering and Technology 2015
RMID: 0030030977
DOI: 10.1049/el.2015.0195
Appears in Collections:Electrical and Electronic Engineering publications

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