Polarisation in the auroral red line during coordinated EISCAT Svalbard Radar/optical experiments
The polarisation of the atomic oxygen red line in the Earth's thermosphere is observed in different configurations with respect to the magnetic field line at high latitude during several coordinated Incoherent Scatter radar/optical experiment campaigns. When pointing northward with a line-of-si...
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ftdoajarticles:oai:doaj.org/article:027fab0a573b4be5afd607693f9f9735 2023-05-15T16:04:40+02:00 Polarisation in the auroral red line during coordinated EISCAT Svalbard Radar/optical experiments M. Barthélémy J. Lilensten F. Pitout C. Simon Wedlund R. Thissen D. Lorentzen F. Sigernes J. Moen G. Gronoff I. McCrea H. Rothkael H. Ménager A. Aruliah 2011-06-01T00:00:00Z https://doi.org/10.5194/angeo-29-1101-2011 https://doaj.org/article/027fab0a573b4be5afd607693f9f9735 EN eng Copernicus Publications https://www.ann-geophys.net/29/1101/2011/angeo-29-1101-2011.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.5194/angeo-29-1101-2011 0992-7689 1432-0576 https://doaj.org/article/027fab0a573b4be5afd607693f9f9735 Annales Geophysicae, Vol 29, Pp 1101-1112 (2011) Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 article 2011 ftdoajarticles https://doi.org/10.5194/angeo-29-1101-2011 2022-12-31T06:03:12Z The polarisation of the atomic oxygen red line in the Earth's thermosphere is observed in different configurations with respect to the magnetic field line at high latitude during several coordinated Incoherent Scatter radar/optical experiment campaigns. When pointing northward with a line-of-sight nearly perpendicular to the magnetic field, we show that, as expected, the polarisation is due to precipitated electrons with characteristic energies of a few hundreds of electron Volts. When pointing toward the zenith or southward with a line-of-sight more parallel to the magnetic field, we show that the polarisation practically disappears. This confirms experimentally the predictions deduced from the recent discovery of the red line polarisation. We show that the polarisation direction is parallel to the magnetic field line during geomagnetic activity intensification and that these results are in agreement with theoretical work. Article in Journal/Newspaper EISCAT Svalbard Directory of Open Access Journals: DOAJ Articles Svalbard Annales Geophysicae 29 6 1101 1112 |
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 M. Barthélémy J. Lilensten F. Pitout C. Simon Wedlund R. Thissen D. Lorentzen F. Sigernes J. Moen G. Gronoff I. McCrea H. Rothkael H. Ménager A. Aruliah Polarisation in the auroral red line during coordinated EISCAT Svalbard Radar/optical experiments |
topic_facet |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 |
description |
The polarisation of the atomic oxygen red line in the Earth's thermosphere is observed in different configurations with respect to the magnetic field line at high latitude during several coordinated Incoherent Scatter radar/optical experiment campaigns. When pointing northward with a line-of-sight nearly perpendicular to the magnetic field, we show that, as expected, the polarisation is due to precipitated electrons with characteristic energies of a few hundreds of electron Volts. When pointing toward the zenith or southward with a line-of-sight more parallel to the magnetic field, we show that the polarisation practically disappears. This confirms experimentally the predictions deduced from the recent discovery of the red line polarisation. We show that the polarisation direction is parallel to the magnetic field line during geomagnetic activity intensification and that these results are in agreement with theoretical work. |
format |
Article in Journal/Newspaper |
author |
M. Barthélémy J. Lilensten F. Pitout C. Simon Wedlund R. Thissen D. Lorentzen F. Sigernes J. Moen G. Gronoff I. McCrea H. Rothkael H. Ménager A. Aruliah |
author_facet |
M. Barthélémy J. Lilensten F. Pitout C. Simon Wedlund R. Thissen D. Lorentzen F. Sigernes J. Moen G. Gronoff I. McCrea H. Rothkael H. Ménager A. Aruliah |
author_sort |
M. Barthélémy |
title |
Polarisation in the auroral red line during coordinated EISCAT Svalbard Radar/optical experiments |
title_short |
Polarisation in the auroral red line during coordinated EISCAT Svalbard Radar/optical experiments |
title_full |
Polarisation in the auroral red line during coordinated EISCAT Svalbard Radar/optical experiments |
title_fullStr |
Polarisation in the auroral red line during coordinated EISCAT Svalbard Radar/optical experiments |
title_full_unstemmed |
Polarisation in the auroral red line during coordinated EISCAT Svalbard Radar/optical experiments |
title_sort |
polarisation in the auroral red line during coordinated eiscat svalbard radar/optical experiments |
publisher |
Copernicus Publications |
publishDate |
2011 |
url |
https://doi.org/10.5194/angeo-29-1101-2011 https://doaj.org/article/027fab0a573b4be5afd607693f9f9735 |
geographic |
Svalbard |
geographic_facet |
Svalbard |
genre |
EISCAT Svalbard |
genre_facet |
EISCAT Svalbard |
op_source |
Annales Geophysicae, Vol 29, Pp 1101-1112 (2011) |
op_relation |
https://www.ann-geophys.net/29/1101/2011/angeo-29-1101-2011.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.5194/angeo-29-1101-2011 0992-7689 1432-0576 https://doaj.org/article/027fab0a573b4be5afd607693f9f9735 |
op_doi |
https://doi.org/10.5194/angeo-29-1101-2011 |
container_title |
Annales Geophysicae |
container_volume |
29 |
container_issue |
6 |
container_start_page |
1101 |
op_container_end_page |
1112 |
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1766400276348010496 |