DocumentCode :
1619453
Title :
Effective earth radius variation and diffraction fading on terrestrial path
Author :
Grabner, Martin ; Kvicera, Vaclav ; Pechac, Pavel ; Jicha, Otakar
Author_Institution :
Freq. Eng. Dept., Czech Metrol. Inst., Praha, Czech Republic
fYear :
2010
Firstpage :
105
Lastpage :
108
Abstract :
Effective earth radius factor (k factor) is an important parameter for the assessment of clear-air propagation on terrestrial paths. Its variation obtained from the measurement of vertical distribution of atmospheric refractivity is studied in the paper. Two year statistics of the k factor are given for the whole year and different months. The related clear-air propagation impairment on the 10 GHz terrestrial path is shown in the example. A typical diffraction fading event is analyzed by a comparison of measured time evolution of received signal level and of a simulated one using measured refractivity. A direct correspondence between the time evolution of the effective earth radius factor and of attenuation due to reduced path clearance is so demonstrated.
Keywords :
electromagnetic wave scattering; fading; microwave propagation; clear air propagation; diffraction fading; effective earth radius factor; effective earth radius variation; frequency 10 GHz; reduced path clearance; terrestrial path; time evolution; Atmospheric measurements; Diffraction; Earth; Fading; Humidity; Refractive index; Time measurement;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Antennas and Propagation Conference (LAPC), 2010 Loughborough
Conference_Location :
Loughborough
Print_ISBN :
978-1-4244-7304-5
Type :
conf
DOI :
10.1109/LAPC.2010.5666792
Filename :
5666792
Link To Document :
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