Atmospheric effects on ultra high frequency radio propagation
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Authors
Boudreaux, Joseph Clent
Subjects
electromagnetic propagation
atmospheric propagation
atmospheric refractive ducting
ducting
diffraction
multimode waveguide
ray tracing
mode theory
atmospheric propagation
atmospheric refractive ducting
ducting
diffraction
multimode waveguide
ray tracing
mode theory
Advisors
Schacher, G.E.
Date of Issue
1982-06
Date
Publisher
Monterey, California. Naval Postgraduate School
Language
en_US
Abstract
The dependence of received power on range witnin and
belcvv atmospheric ducts was measured in conditions of
elevated, nonhomogeneous , multilayered ducts. An aircraft
with UHF transmitter covered the range to 150 nm. from a
shore based receiver. Range dependent maxima and minima
in received power were detected at tne surface in elevated
duct conditions. The results were compared to predictions
from ray, waveguide multi- mode, and single mode theories.
Ray and single mode theories were inadequate to
predict power patterns over the horizon. Multi-mode theory
yielded qualitative agreement for conditions of deep, low
elevated ducts. Agreement for higher, thinner ducts was
poor. Multilayered duct systems were observed and produced
interference patterns without recognizable period with
range.
Type
Thesis
Description
Series/Report No
Department
Physics
Organization
Naval Postgraduate School
Identifiers
NPS Report Number
Sponsors
Funder
Format
Citation
Distribution Statement
Approved for public release; distribution is unlimited.