Space weather effects on radio propagation: study of the CEDAR, GEM and ISTP storm events
The impact of 14 geomagnetic storms from a list of CEDAR, GEM and ISTP storms, that occurred during 1997–1999, on radio propagation conditions has been investigated. The propagation conditions were estimated through variations of the MOF and LOF (the maximum and lowest operation frequencies) on thre...
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ftdoajarticles:oai:doaj.org/article:3afef7adefb64f98814726d22e9c48c0 2023-05-15T17:40:34+02:00 Space weather effects on radio propagation: study of the CEDAR, GEM and ISTP storm events D. V. Blagoveshchensky A. S. Kalishin M. A. Sergeyeva 2008-06-01T00:00:00Z https://doi.org/10.5194/angeo-26-1479-2008 https://doaj.org/article/3afef7adefb64f98814726d22e9c48c0 EN eng Copernicus Publications https://www.ann-geophys.net/26/1479/2008/angeo-26-1479-2008.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.5194/angeo-26-1479-2008 0992-7689 1432-0576 https://doaj.org/article/3afef7adefb64f98814726d22e9c48c0 Annales Geophysicae, Vol 26, Pp 1479-1490 (2008) Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 article 2008 ftdoajarticles https://doi.org/10.5194/angeo-26-1479-2008 2022-12-31T14:53:23Z The impact of 14 geomagnetic storms from a list of CEDAR, GEM and ISTP storms, that occurred during 1997–1999, on radio propagation conditions has been investigated. The propagation conditions were estimated through variations of the MOF and LOF (the maximum and lowest operation frequencies) on three high-latitude HF radio paths in north-west Russia. Geophysical data of D st , B z , AE as well as some riometer data from Sodankyla observatory, Finland, were used for the analysis. It was shown that the storm impact on the ionosphere and radio propagation for each storm has an individual character. Nevertheless, there are common patterns in variation of the propagation parameters for all storms. Thus, the frequency range Δ=MOF−LOF increases several hours before a storm, then it narrows sharply during the storm, and expands again several hours after the end of the storm. This regular behaviour should be useful for the HF radio propagation predictions and frequency management at high latitudes. On the trans-auroral radio path, the time interval when the signal is lost through a storm ( t des ) depends on the local time. For the day-time storms an average value t des is 6 h, but for night storms t des is only 2 h. The ionization increase in the F2 layer before storm onset is 3.5 h during the day-time and 2.4 h at night. Mechanisms to explain the observed variations are discussed including some novel possibilities involving energy input through the cusp. Article in Journal/Newspaper North-West Russia Directory of Open Access Journals: DOAJ Articles Annales Geophysicae 26 6 1479 1490 |
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Directory of Open Access Journals: DOAJ Articles |
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English |
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Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 |
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Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 D. V. Blagoveshchensky A. S. Kalishin M. A. Sergeyeva Space weather effects on radio propagation: study of the CEDAR, GEM and ISTP storm events |
topic_facet |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 |
description |
The impact of 14 geomagnetic storms from a list of CEDAR, GEM and ISTP storms, that occurred during 1997–1999, on radio propagation conditions has been investigated. The propagation conditions were estimated through variations of the MOF and LOF (the maximum and lowest operation frequencies) on three high-latitude HF radio paths in north-west Russia. Geophysical data of D st , B z , AE as well as some riometer data from Sodankyla observatory, Finland, were used for the analysis. It was shown that the storm impact on the ionosphere and radio propagation for each storm has an individual character. Nevertheless, there are common patterns in variation of the propagation parameters for all storms. Thus, the frequency range Δ=MOF−LOF increases several hours before a storm, then it narrows sharply during the storm, and expands again several hours after the end of the storm. This regular behaviour should be useful for the HF radio propagation predictions and frequency management at high latitudes. On the trans-auroral radio path, the time interval when the signal is lost through a storm ( t des ) depends on the local time. For the day-time storms an average value t des is 6 h, but for night storms t des is only 2 h. The ionization increase in the F2 layer before storm onset is 3.5 h during the day-time and 2.4 h at night. Mechanisms to explain the observed variations are discussed including some novel possibilities involving energy input through the cusp. |
format |
Article in Journal/Newspaper |
author |
D. V. Blagoveshchensky A. S. Kalishin M. A. Sergeyeva |
author_facet |
D. V. Blagoveshchensky A. S. Kalishin M. A. Sergeyeva |
author_sort |
D. V. Blagoveshchensky |
title |
Space weather effects on radio propagation: study of the CEDAR, GEM and ISTP storm events |
title_short |
Space weather effects on radio propagation: study of the CEDAR, GEM and ISTP storm events |
title_full |
Space weather effects on radio propagation: study of the CEDAR, GEM and ISTP storm events |
title_fullStr |
Space weather effects on radio propagation: study of the CEDAR, GEM and ISTP storm events |
title_full_unstemmed |
Space weather effects on radio propagation: study of the CEDAR, GEM and ISTP storm events |
title_sort |
space weather effects on radio propagation: study of the cedar, gem and istp storm events |
publisher |
Copernicus Publications |
publishDate |
2008 |
url |
https://doi.org/10.5194/angeo-26-1479-2008 https://doaj.org/article/3afef7adefb64f98814726d22e9c48c0 |
genre |
North-West Russia |
genre_facet |
North-West Russia |
op_source |
Annales Geophysicae, Vol 26, Pp 1479-1490 (2008) |
op_relation |
https://www.ann-geophys.net/26/1479/2008/angeo-26-1479-2008.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.5194/angeo-26-1479-2008 0992-7689 1432-0576 https://doaj.org/article/3afef7adefb64f98814726d22e9c48c0 |
op_doi |
https://doi.org/10.5194/angeo-26-1479-2008 |
container_title |
Annales Geophysicae |
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26 |
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6 |
container_start_page |
1479 |
op_container_end_page |
1490 |
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1766141515478859776 |