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...
Published in: | Annales Geophysicae |
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ftcopernicus:oai:publications.copernicus.org:angeo35027 2023-05-15T16:04:31+02:00 Morning sector drift-bounce resonance driven ULF waves observed in artificially-induced HF radar backscatter Baddeley, L. J. Yeoman, T. K. Wright, D. M. Davies, J. A. Trattner, K. J. Roeder, J. L. 2018-09-27 application/pdf https://doi.org/10.5194/angeo-20-1487-2002 https://angeo.copernicus.org/articles/20/1487/2002/ eng eng doi:10.5194/angeo-20-1487-2002 https://angeo.copernicus.org/articles/20/1487/2002/ eISSN: 1432-0576 Text 2018 ftcopernicus https://doi.org/10.5194/angeo-20-1487-2002 2020-07-20T16:27:49Z 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) Text EISCAT Tromsø Copernicus Publications: E-Journals Tromsø Annales Geophysicae 20 9 1487 1498 |
institution |
Open Polar |
collection |
Copernicus Publications: E-Journals |
op_collection_id |
ftcopernicus |
language |
English |
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 |
Text |
author |
Baddeley, L. J. Yeoman, T. K. Wright, D. M. Davies, J. A. Trattner, K. J. Roeder, J. L. |
spellingShingle |
Baddeley, L. J. Yeoman, T. K. Wright, D. M. Davies, J. A. Trattner, K. J. Roeder, J. L. Morning sector drift-bounce resonance driven ULF waves observed in artificially-induced HF radar backscatter |
author_facet |
Baddeley, L. J. Yeoman, T. K. Wright, D. M. Davies, J. A. Trattner, K. J. Roeder, J. L. |
author_sort |
Baddeley, L. J. |
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 |
publishDate |
2018 |
url |
https://doi.org/10.5194/angeo-20-1487-2002 https://angeo.copernicus.org/articles/20/1487/2002/ |
geographic |
Tromsø |
geographic_facet |
Tromsø |
genre |
EISCAT Tromsø |
genre_facet |
EISCAT Tromsø |
op_source |
eISSN: 1432-0576 |
op_relation |
doi:10.5194/angeo-20-1487-2002 https://angeo.copernicus.org/articles/20/1487/2002/ |
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 |
_version_ |
1766400097749303296 |