Statistical signature of active D-region HF heating in IRIS riometer data from 1994–2004
In this paper we study the effect of artificial HF heating on cosmic radio noise absorption in the D-region ionosphere. The effect has earlier been studied theoretically in idealised cases and without experimental verification. Here we present a 3-dimensional modelling of the effect, taking into acc...
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00032585 2023-05-15T16:04:41+02:00 Statistical signature of active D-region HF heating in IRIS riometer data from 1994–2004 Kero, A. Enell, C.-F. Ulich, Th. Turunen, E. Rietveld, M. T. Honary, F. H. 2007-03 electronic https://doi.org/10.5194/angeo-25-407-2007 https://noa.gwlb.de/receive/cop_mods_00032585 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00032539/angeo-25-407-2007.pdf https://angeo.copernicus.org/articles/25/407/2007/angeo-25-407-2007.pdf eng eng Copernicus Publications Annales Geophysicae -- http://www.bibliothek.uni-regensburg.de/ezeit/?1458425 -- https://www.ann-geophys.net/ -- https://www.ann-geophys.net/volumes.html -- http://link.springer.com/journal/585 -- 1432-0576 https://doi.org/10.5194/angeo-25-407-2007 https://noa.gwlb.de/receive/cop_mods_00032585 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00032539/angeo-25-407-2007.pdf https://angeo.copernicus.org/articles/25/407/2007/angeo-25-407-2007.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2007 ftnonlinearchiv https://doi.org/10.5194/angeo-25-407-2007 2022-02-08T22:46:11Z In this paper we study the effect of artificial HF heating on cosmic radio noise absorption in the D-region ionosphere. The effect has earlier been studied theoretically in idealised cases and without experimental verification. Here we present a 3-dimensional modelling of the effect, taking into account the directivity patterns of the vertical beam of the EISCAT Heater at Tromsø, Norway, and the intersecting beam of the IRIS imaging riometer at Kilpisjärvi, Finland. The heater-induced enhancement of cosmic radio noise absorption at the IRIS frequency (38.2 MHz) is estimated to be between 0.02 dB and 0.05 dB in the most representative model cases. However, a statistical study of IRIS data from a selected set of heating experiments carried out during the years 1994–2004 shows that the median effect is between 0.002 dB and 0.004 dB, i.e. an order of magnitude less than theoretically predicted. This indicates that the actual HF heating effect at D-region altitudes is substantially overestimated by the present theory. Article in Journal/Newspaper EISCAT Kilpisjärvi Tromsø Niedersächsisches Online-Archiv NOA Kilpisjärvi ENVELOPE(20.767,20.767,69.034,69.034) Norway Tromsø Annales Geophysicae 25 2 407 415 |
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Open Polar |
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Niedersächsisches Online-Archiv NOA |
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ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Kero, A. Enell, C.-F. Ulich, Th. Turunen, E. Rietveld, M. T. Honary, F. H. Statistical signature of active D-region HF heating in IRIS riometer data from 1994–2004 |
topic_facet |
article Verlagsveröffentlichung |
description |
In this paper we study the effect of artificial HF heating on cosmic radio noise absorption in the D-region ionosphere. The effect has earlier been studied theoretically in idealised cases and without experimental verification. Here we present a 3-dimensional modelling of the effect, taking into account the directivity patterns of the vertical beam of the EISCAT Heater at Tromsø, Norway, and the intersecting beam of the IRIS imaging riometer at Kilpisjärvi, Finland. The heater-induced enhancement of cosmic radio noise absorption at the IRIS frequency (38.2 MHz) is estimated to be between 0.02 dB and 0.05 dB in the most representative model cases. However, a statistical study of IRIS data from a selected set of heating experiments carried out during the years 1994–2004 shows that the median effect is between 0.002 dB and 0.004 dB, i.e. an order of magnitude less than theoretically predicted. This indicates that the actual HF heating effect at D-region altitudes is substantially overestimated by the present theory. |
format |
Article in Journal/Newspaper |
author |
Kero, A. Enell, C.-F. Ulich, Th. Turunen, E. Rietveld, M. T. Honary, F. H. |
author_facet |
Kero, A. Enell, C.-F. Ulich, Th. Turunen, E. Rietveld, M. T. Honary, F. H. |
author_sort |
Kero, A. |
title |
Statistical signature of active D-region HF heating in IRIS riometer data from 1994–2004 |
title_short |
Statistical signature of active D-region HF heating in IRIS riometer data from 1994–2004 |
title_full |
Statistical signature of active D-region HF heating in IRIS riometer data from 1994–2004 |
title_fullStr |
Statistical signature of active D-region HF heating in IRIS riometer data from 1994–2004 |
title_full_unstemmed |
Statistical signature of active D-region HF heating in IRIS riometer data from 1994–2004 |
title_sort |
statistical signature of active d-region hf heating in iris riometer data from 1994–2004 |
publisher |
Copernicus Publications |
publishDate |
2007 |
url |
https://doi.org/10.5194/angeo-25-407-2007 https://noa.gwlb.de/receive/cop_mods_00032585 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00032539/angeo-25-407-2007.pdf https://angeo.copernicus.org/articles/25/407/2007/angeo-25-407-2007.pdf |
long_lat |
ENVELOPE(20.767,20.767,69.034,69.034) |
geographic |
Kilpisjärvi Norway Tromsø |
geographic_facet |
Kilpisjärvi Norway Tromsø |
genre |
EISCAT Kilpisjärvi Tromsø |
genre_facet |
EISCAT Kilpisjärvi Tromsø |
op_relation |
Annales Geophysicae -- http://www.bibliothek.uni-regensburg.de/ezeit/?1458425 -- https://www.ann-geophys.net/ -- https://www.ann-geophys.net/volumes.html -- http://link.springer.com/journal/585 -- 1432-0576 https://doi.org/10.5194/angeo-25-407-2007 https://noa.gwlb.de/receive/cop_mods_00032585 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00032539/angeo-25-407-2007.pdf https://angeo.copernicus.org/articles/25/407/2007/angeo-25-407-2007.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/angeo-25-407-2007 |
container_title |
Annales Geophysicae |
container_volume |
25 |
container_issue |
2 |
container_start_page |
407 |
op_container_end_page |
415 |
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1766400300234571776 |