Effective Earth Radius Variation and Diffraction Fading on Terrestrial Path
Result description
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 ofmeasured 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
Atmospheric measurementsDiffractionEarthFadingHumidityRefractive indexTime measurement
The result's identifiers
Result code in IS VaVaI
Result on the web
DOI - Digital Object Identifier
Alternative languages
Result language
angličtina
Original language name
Effective Earth Radius Variation and Diffraction Fading on Terrestrial Path
Original language description
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 ofmeasured 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.
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
JA - Electronics and optoelectronics
OECD FORD branch
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Result continuities
Project
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2010
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
2010 Loughborough Antennas and Propagation Conference (LAPC)
ISBN
978-1-4244-7304-5
ISSN
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e-ISSN
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Number of pages
4
Pages from-to
105-108
Publisher name
Loughborough University
Place of publication
Loughborough
Event location
Loughborough
Event date
Aug 22, 2010
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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Basic information
Result type
D - Article in proceedings
CEP
JA - Electronics and optoelectronics
Year of implementation
2010