Title :
On the short-term time evolution of elevated ducting layers
Author :
Grabner, Martin ; Kvicera, Vaclav ; Pechac, Pavel ; Jicha, O.
Author_Institution :
Dept. of Freq. Eng., Czech Metrol. Inst., Prague, Czech Republic
Abstract :
Vertical profiles of atmospheric refractivity are obtained from the tower measurement of temperature and humidity profiles with a vertical resolution less than eight meters and a time resolution one minute. Profiles are described using a modified Webster model with model parameters fitted by nonlinear regression. The time series of fitted parameters show the short-term time evolution of elevated ducting layers. Several typical examples of evolving ducting layers are provided and discussed.
Keywords :
electromagnetic wave refraction; humidity measurement; refractive index measurement; regression analysis; temperature measurement; atmospheric refractivity; elevated ducting layers; humidity profiles; modified Webster model; nonlinear regression; short-term time evolution; temperature profiles; time series; tower measurement; vertical profiles; Atmospheric measurements; Atmospheric modeling; Ducts; Humidity; Humidity measurement; Refractive index; Temperature measurement; Propagation; atmospheric refractivity; ducting layer;
Conference_Titel :
Antennas and Propagation Conference (LAPC), 2012 Loughborough
Conference_Location :
Loughborough
Print_ISBN :
978-1-4673-2218-8
Electronic_ISBN :
978-1-4673-2219-5
DOI :
10.1109/LAPC.2012.6402992
