Performance limiters of near-vertical-incidence skywave propagation : a scientific approach

Show simple item record Coetzee, Petrus J. Du Plessis, W.P. (Warren Paul) 2020-10-29T13:02:42Z 2020-10-29T13:02:42Z 2020-06
dc.description.abstract Near-vertical-incidence skywave (NVIS) propagation is defined as providing continuous coverage from nearly 0 km (just beyond the line of sight) to a couple hundred kilometers from the transmitter with no skip or dead zones. NVIS communications are especially effective during disaster-relief operations when infrastructure is severely damaged. The ability to accurately determine the performance limiters of NVIS propagation can help in the planning of high-frequency (HF) (3-30 MHz) emergency communication links. In the literature, widely varying radial distances (from as few as 50 to up to 160 or even 320 km) for the coverage attainable by NVIS propagation have been reported. It is very difficult to plan an NVIS link for homeland security or disaster relief when the published guidelines vary to such a degree. In this study, a scientific approach was utilized to determine the NVIS performance limiters for varying solar conditions, times of day, and geophysical locations. en_ZA
dc.description.department Electrical, Electronic and Computer Engineering en_ZA
dc.description.librarian hj2020 en_ZA
dc.description.sponsorship GEW Technologies (Pty) Ltd and the National Research Foundation of South Africa (NRF). en_ZA
dc.description.uri en_ZA
dc.identifier.citation P. J. Coetzee and W. P. du Plessis, "Performance Limiters of Near-Vertical-Incidence Skywave Propagation: A Scientific Approach," in IEEE Antennas and Propagation Magazine, vol. 62, no. 3, pp. 39-44, June 2020, doi: 10.1109/MAP.2019.2943313. en_ZA
dc.identifier.issn 1045-9243 (print)
dc.identifier.issn 1558-4143 (online)
dc.identifier.other 10.1109/MAP.2019.2943313
dc.language.iso en en_ZA
dc.publisher Institute of Electrical and Electronics Engineers en_ZA
dc.rights © 2020 IEEE. Personal use is permitted, but republication/redistribution requires IEEE permission. en_ZA
dc.subject Dipole antennas en_ZA
dc.subject Ionosphere en_ZA
dc.subject Antenna radiation patterns en_ZA
dc.subject Ray tracing en_ZA
dc.subject Electromagnetics en_ZA
dc.subject Radiocommunication en_ZA
dc.subject Ionospheric electromagnetic wave propagation en_ZA
dc.subject HF radio propagation en_ZA
dc.subject HF antennas en_ZA
dc.subject Disasters en_ZA
dc.subject Near-vertical-incidence skywave (NVIS) en_ZA
dc.subject High-frequency (HF) en_ZA
dc.title Performance limiters of near-vertical-incidence skywave propagation : a scientific approach en_ZA
dc.type Postprint Article en_ZA

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