Determining characteristics of HF communications links using SuperDARN
| Autor: | J. M. Hughes, W. A. Bristow, R. A. Greenwald, R. J. Barnes |
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| Jazyk: | angličtina |
| Rok vydání: | 2002 |
| Předmět: | |
| Zdroj: | Annales Geophysicae, Vol 20, Pp 1023-1030 (2002) |
| Druh dokumentu: | article |
| ISSN: | 0992-7689 1432-0576 |
| DOI: | 10.5194/angeo-20-1023-2002 |
| Popis: | 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) |
| Databáze: | Directory of Open Access Journals |
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