Statistical signature of active D-region HF heating in IRIS riometer data from 1994?2004
International audience 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...
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ftccsdartic:oai:HAL:hal-00318273v1 2023-11-12T04:16:36+01:00 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. Sodankylä Geophysical Observatory University of Oulu EISCAT Scientific Association Dept. of Communication Systems 2007-03-08 https://hal.science/hal-00318273 https://hal.science/hal-00318273/document https://hal.science/hal-00318273/file/angeo-25-407-2007.pdf en eng HAL CCSD European Geosciences Union hal-00318273 https://hal.science/hal-00318273 https://hal.science/hal-00318273/document https://hal.science/hal-00318273/file/angeo-25-407-2007.pdf info:eu-repo/semantics/OpenAccess ISSN: 0992-7689 EISSN: 1432-0576 Annales Geophysicae https://hal.science/hal-00318273 Annales Geophysicae, 2007, 25 (2), pp.407-415 [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2007 ftccsdartic 2023-10-21T23:06:37Z International audience 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 Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Norway Tromsø Kilpisjärvi ENVELOPE(20.767,20.767,69.034,69.034) |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences 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 |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience 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. |
author2 |
Sodankylä Geophysical Observatory University of Oulu EISCAT Scientific Association Dept. of Communication Systems |
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 |
HAL CCSD |
publishDate |
2007 |
url |
https://hal.science/hal-00318273 https://hal.science/hal-00318273/document https://hal.science/hal-00318273/file/angeo-25-407-2007.pdf |
long_lat |
ENVELOPE(20.767,20.767,69.034,69.034) |
geographic |
Norway Tromsø Kilpisjärvi |
geographic_facet |
Norway Tromsø Kilpisjärvi |
genre |
EISCAT Kilpisjärvi Tromsø |
genre_facet |
EISCAT Kilpisjärvi Tromsø |
op_source |
ISSN: 0992-7689 EISSN: 1432-0576 Annales Geophysicae https://hal.science/hal-00318273 Annales Geophysicae, 2007, 25 (2), pp.407-415 |
op_relation |
hal-00318273 https://hal.science/hal-00318273 https://hal.science/hal-00318273/document https://hal.science/hal-00318273/file/angeo-25-407-2007.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1782333692185673728 |