ULF wave occurrence statistics in a high-latitude HF Doppler sounder
Ultra low frequency (ULF) wave activity in the high-latitude ionosphere has been observed by a high frequency (HF) Doppler sounder located at Tromsø, Norway (69.7°N, 19.2°E geographic coordinates). A statistical study of the occurrence of these waves has been undertaken from data collected between 1...
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ftleicesterunfig:oai:figshare.com:article/10113713 2023-05-15T18:34:37+02:00 ULF wave occurrence statistics in a high-latitude HF Doppler sounder D. M. Wright T. K. Yeoman T. B. Jones 1999-06-01T00:00:00Z https://figshare.com/articles/journal_contribution/ULF_wave_occurrence_statistics_in_a_high-latitude_HF_Doppler_sounder/10113713 unknown 2381/18369 https://figshare.com/articles/journal_contribution/ULF_wave_occurrence_statistics_in_a_high-latitude_HF_Doppler_sounder/10113713 All Rights Reserved Uncategorized Science & Technology Physical Sciences Astronomy & Astrophysics Geosciences Multidisciplinary Meteorology & Atmospheric Sciences Geology ionosphere (auroral ionosphere ionosphere magnetosphere interactions) magnetospheric physics (MHD waves and instabilities) AURORAL BACKSCATTER EXPERIMENT FIELD-LINE RESONANCES GEOSTATIONARY ORBIT HYDROMAGNETIC-WAVES PULSATIONS OSCILLATIONS RADAR RANGE MAGNETOSPHERE STARE Text Journal contribution 1999 ftleicesterunfig 2021-11-11T20:05:33Z Ultra low frequency (ULF) wave activity in the high-latitude ionosphere has been observed by a high frequency (HF) Doppler sounder located at Tromsø, Norway (69.7°N, 19.2°E geographic coordinates). A statistical study of the occurrence of these waves has been undertaken from data collected between 1979 and 1984. The diurnal, seasonal, solar cycle and geomagnetic activity variations in occurrence have been investigated. The findings demonstrate that the ability of the sounder to detect ULF wave signatures maximises at the equinoxes and that there is a peak in occurrence in the morning sector. The occurrence rate is fairly insensitive to changes associated with the solar cycle but increases with the level of geomagnetic activity. As a result, it has been possible to characterise the way in which prevailing ionospheric and magnetospheric conditions affect such observations of ULF waves. Other Non-Article Part of Journal/Newspaper Tromsø University of Leicester: Figshare Norway Tromsø |
institution |
Open Polar |
collection |
University of Leicester: Figshare |
op_collection_id |
ftleicesterunfig |
language |
unknown |
topic |
Uncategorized Science & Technology Physical Sciences Astronomy & Astrophysics Geosciences Multidisciplinary Meteorology & Atmospheric Sciences Geology ionosphere (auroral ionosphere ionosphere magnetosphere interactions) magnetospheric physics (MHD waves and instabilities) AURORAL BACKSCATTER EXPERIMENT FIELD-LINE RESONANCES GEOSTATIONARY ORBIT HYDROMAGNETIC-WAVES PULSATIONS OSCILLATIONS RADAR RANGE MAGNETOSPHERE STARE |
spellingShingle |
Uncategorized Science & Technology Physical Sciences Astronomy & Astrophysics Geosciences Multidisciplinary Meteorology & Atmospheric Sciences Geology ionosphere (auroral ionosphere ionosphere magnetosphere interactions) magnetospheric physics (MHD waves and instabilities) AURORAL BACKSCATTER EXPERIMENT FIELD-LINE RESONANCES GEOSTATIONARY ORBIT HYDROMAGNETIC-WAVES PULSATIONS OSCILLATIONS RADAR RANGE MAGNETOSPHERE STARE D. M. Wright T. K. Yeoman T. B. Jones ULF wave occurrence statistics in a high-latitude HF Doppler sounder |
topic_facet |
Uncategorized Science & Technology Physical Sciences Astronomy & Astrophysics Geosciences Multidisciplinary Meteorology & Atmospheric Sciences Geology ionosphere (auroral ionosphere ionosphere magnetosphere interactions) magnetospheric physics (MHD waves and instabilities) AURORAL BACKSCATTER EXPERIMENT FIELD-LINE RESONANCES GEOSTATIONARY ORBIT HYDROMAGNETIC-WAVES PULSATIONS OSCILLATIONS RADAR RANGE MAGNETOSPHERE STARE |
description |
Ultra low frequency (ULF) wave activity in the high-latitude ionosphere has been observed by a high frequency (HF) Doppler sounder located at Tromsø, Norway (69.7°N, 19.2°E geographic coordinates). A statistical study of the occurrence of these waves has been undertaken from data collected between 1979 and 1984. The diurnal, seasonal, solar cycle and geomagnetic activity variations in occurrence have been investigated. The findings demonstrate that the ability of the sounder to detect ULF wave signatures maximises at the equinoxes and that there is a peak in occurrence in the morning sector. The occurrence rate is fairly insensitive to changes associated with the solar cycle but increases with the level of geomagnetic activity. As a result, it has been possible to characterise the way in which prevailing ionospheric and magnetospheric conditions affect such observations of ULF waves. |
format |
Other Non-Article Part of Journal/Newspaper |
author |
D. M. Wright T. K. Yeoman T. B. Jones |
author_facet |
D. M. Wright T. K. Yeoman T. B. Jones |
author_sort |
D. M. Wright |
title |
ULF wave occurrence statistics in a high-latitude HF Doppler sounder |
title_short |
ULF wave occurrence statistics in a high-latitude HF Doppler sounder |
title_full |
ULF wave occurrence statistics in a high-latitude HF Doppler sounder |
title_fullStr |
ULF wave occurrence statistics in a high-latitude HF Doppler sounder |
title_full_unstemmed |
ULF wave occurrence statistics in a high-latitude HF Doppler sounder |
title_sort |
ulf wave occurrence statistics in a high-latitude hf doppler sounder |
publishDate |
1999 |
url |
https://figshare.com/articles/journal_contribution/ULF_wave_occurrence_statistics_in_a_high-latitude_HF_Doppler_sounder/10113713 |
geographic |
Norway Tromsø |
geographic_facet |
Norway Tromsø |
genre |
Tromsø |
genre_facet |
Tromsø |
op_relation |
2381/18369 https://figshare.com/articles/journal_contribution/ULF_wave_occurrence_statistics_in_a_high-latitude_HF_Doppler_sounder/10113713 |
op_rights |
All Rights Reserved |
_version_ |
1766219436905201664 |