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| Titel |
Nonlinear forecasts of ƒoF2: variation of model predictive accuracy over time |
| VerfasserIn |
A. H. Y. Chan, P. S. Cannon |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 20, no. 7 ; Nr. 20, no. 7, S.1031-1038 |
| Datensatznummer |
250014430
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| Publikation (Nr.) |
 copernicus.org/angeo-20-1031-2002.pdf |
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| Zusammenfassung |
Space weather effects can
strongly influence high-frequency (HF) communications by changing the
ionospheric environment through which the radio waves propagate. Since many
systems utilize HF communications, the ability to make real-time assessments of
propagation conditions is an important part of space weather monitoring
systems. In this paper, we present new techniques for measuring high-latitude
HF communications link parameters using data from SuperDARN radars. These
techniques use ground-scatter returns to define the variation in skip distance
with frequency. From these data, the maximum usable frequency (MUF) as a
function of range is determined and ionospheric critical frequencies are
estimated. These calculations are made in near-real-time and the results are
made available on the World Wide Web. F-region critical frequencies calculated
using this method show good agreement with ionosonde data.
Key words. Ionosphere (active
experiments; instruments and techniques) – Radio science (ionospheric
propagation) |
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