Morning sector drift-bounce resonance driven ULF waves observed in artificially-induced HF radar backscatter
HF radar backscatter, which has been artificially-induced by a high power RF facility such as the EISCAT heater at Tromsø, has provided coherent radar ionospheric electric field data of unprecedented temporal resolution and accuracy. Here such data are used to investigate ULF wave processes observed...
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ftdoajarticles:oai:doaj.org/article:0c72f5554d92414c8168884fc557f418 2023-05-15T16:04:31+02:00 Morning sector drift-bounce resonance driven ULF waves observed in artificially-induced HF radar backscatter L. J. Baddeley T. K. Yeoman D. M. Wright J. A. Davies K. J. Trattner J. L. Roeder 2002-09-01T00:00:00Z https://doi.org/10.5194/angeo-20-1487-2002 https://doaj.org/article/0c72f5554d92414c8168884fc557f418 EN eng Copernicus Publications https://www.ann-geophys.net/20/1487/2002/angeo-20-1487-2002.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.5194/angeo-20-1487-2002 0992-7689 1432-0576 https://doaj.org/article/0c72f5554d92414c8168884fc557f418 Annales Geophysicae, Vol 20, Pp 1487-1498 (2002) Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 article 2002 ftdoajarticles https://doi.org/10.5194/angeo-20-1487-2002 2022-12-31T06:16:47Z HF radar backscatter, which has been artificially-induced by a high power RF facility such as the EISCAT heater at Tromsø, has provided coherent radar ionospheric electric field data of unprecedented temporal resolution and accuracy. Here such data are used to investigate ULF wave processes observed by both the CUTLASS HF radars and the EISCAT UHF radar. Data from the SP-UK-OUCH experiment have revealed small-scale (high azimuthal wave number, m -45) waves, predominantly in the morning sector, thought to be brought about by the drift-bounce resonance processes. Conjugate observations from the Polar CAM-MICE instrument indicate the presence of a non-Maxwellian ion distribution function. Further statistical analysis has been undertaken, using the Polar TIMAS instrument, to reveal the prevalence and magnitude of the non-Maxwellian energetic particle populations thought to be responsible for generating these wave types. Key words. Ionosphere (active experiments; wave-particle interactions) Magnetospheric physics (MHD waves and instabilities) Article in Journal/Newspaper EISCAT Tromsø Directory of Open Access Journals: DOAJ Articles Tromsø Annales Geophysicae 20 9 1487 1498 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 |
spellingShingle |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 L. J. Baddeley T. K. Yeoman D. M. Wright J. A. Davies K. J. Trattner J. L. Roeder Morning sector drift-bounce resonance driven ULF waves observed in artificially-induced HF radar backscatter |
topic_facet |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 |
description |
HF radar backscatter, which has been artificially-induced by a high power RF facility such as the EISCAT heater at Tromsø, has provided coherent radar ionospheric electric field data of unprecedented temporal resolution and accuracy. Here such data are used to investigate ULF wave processes observed by both the CUTLASS HF radars and the EISCAT UHF radar. Data from the SP-UK-OUCH experiment have revealed small-scale (high azimuthal wave number, m -45) waves, predominantly in the morning sector, thought to be brought about by the drift-bounce resonance processes. Conjugate observations from the Polar CAM-MICE instrument indicate the presence of a non-Maxwellian ion distribution function. Further statistical analysis has been undertaken, using the Polar TIMAS instrument, to reveal the prevalence and magnitude of the non-Maxwellian energetic particle populations thought to be responsible for generating these wave types. Key words. Ionosphere (active experiments; wave-particle interactions) Magnetospheric physics (MHD waves and instabilities) |
format |
Article in Journal/Newspaper |
author |
L. J. Baddeley T. K. Yeoman D. M. Wright J. A. Davies K. J. Trattner J. L. Roeder |
author_facet |
L. J. Baddeley T. K. Yeoman D. M. Wright J. A. Davies K. J. Trattner J. L. Roeder |
author_sort |
L. J. Baddeley |
title |
Morning sector drift-bounce resonance driven ULF waves observed in artificially-induced HF radar backscatter |
title_short |
Morning sector drift-bounce resonance driven ULF waves observed in artificially-induced HF radar backscatter |
title_full |
Morning sector drift-bounce resonance driven ULF waves observed in artificially-induced HF radar backscatter |
title_fullStr |
Morning sector drift-bounce resonance driven ULF waves observed in artificially-induced HF radar backscatter |
title_full_unstemmed |
Morning sector drift-bounce resonance driven ULF waves observed in artificially-induced HF radar backscatter |
title_sort |
morning sector drift-bounce resonance driven ulf waves observed in artificially-induced hf radar backscatter |
publisher |
Copernicus Publications |
publishDate |
2002 |
url |
https://doi.org/10.5194/angeo-20-1487-2002 https://doaj.org/article/0c72f5554d92414c8168884fc557f418 |
geographic |
Tromsø |
geographic_facet |
Tromsø |
genre |
EISCAT Tromsø |
genre_facet |
EISCAT Tromsø |
op_source |
Annales Geophysicae, Vol 20, Pp 1487-1498 (2002) |
op_relation |
https://www.ann-geophys.net/20/1487/2002/angeo-20-1487-2002.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.5194/angeo-20-1487-2002 0992-7689 1432-0576 https://doaj.org/article/0c72f5554d92414c8168884fc557f418 |
op_doi |
https://doi.org/10.5194/angeo-20-1487-2002 |
container_title |
Annales Geophysicae |
container_volume |
20 |
container_issue |
9 |
container_start_page |
1487 |
op_container_end_page |
1498 |
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1766400102590578688 |