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

dc.contributor.authorCoetzee, Petrus J.
dc.contributor.authorDu Plessis, Warren Paul
dc.date.accessioned2020-10-29T13:02:42Z
dc.date.available2020-10-29T13:02:42Z
dc.date.issued2020-06
dc.description.abstractNear-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.departmentElectrical, Electronic and Computer Engineeringen_ZA
dc.description.librarianhj2020en_ZA
dc.description.sponsorshipGEW Technologies (Pty) Ltd and the National Research Foundation of South Africa (NRF).en_ZA
dc.description.urihttp://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=74en_ZA
dc.identifier.citationP. 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.issn1045-9243 (print)
dc.identifier.issn1558-4143 (online)
dc.identifier.other10.1109/MAP.2019.2943313
dc.identifier.urihttp://hdl.handle.net/2263/76668
dc.language.isoenen_ZA
dc.publisherInstitute of Electrical and Electronics Engineersen_ZA
dc.rights© 2020 IEEE. Personal use is permitted, but republication/redistribution requires IEEE permission.en_ZA
dc.subjectDipole antennasen_ZA
dc.subjectIonosphereen_ZA
dc.subjectAntenna radiation patternsen_ZA
dc.subjectRay tracingen_ZA
dc.subjectElectromagneticsen_ZA
dc.subjectRadiocommunicationen_ZA
dc.subjectIonospheric electromagnetic wave propagationen_ZA
dc.subjectHF radio propagationen_ZA
dc.subjectHF antennasen_ZA
dc.subjectDisastersen_ZA
dc.subjectNear-vertical-incidence skywave (NVIS)en_ZA
dc.subjectHigh-frequency (HF)en_ZA
dc.titlePerformance limiters of near-vertical-incidence skywave propagation : a scientific approachen_ZA
dc.typePostprint Articleen_ZA

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