Observations of the cusp region under northward IMF
We present a comparative study of the cusp region using the EISCAT Svalbard Radars (ESR) and the Cluster spacecraft. We focus in this paper on 2 February 2001, over the time period from 07:30 UT to 12:00 UT when the oblique ESR antenna pointing northward at a low elevation recorded latitudinal motio...
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ftdoajarticles:oai:doaj.org/article:23b32f4ad1014a3ebdb63cd137529557 2023-05-15T16:04:36+02:00 Observations of the cusp region under northward IMF F. Pitout J.-M. Bosqued D. Alcaydé W. F. Denig H. Rème 2001-09-01T00:00:00Z https://doi.org/10.5194/angeo-19-1641-2001 https://doaj.org/article/23b32f4ad1014a3ebdb63cd137529557 EN eng Copernicus Publications https://www.ann-geophys.net/19/1641/2001/angeo-19-1641-2001.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.5194/angeo-19-1641-2001 0992-7689 1432-0576 https://doaj.org/article/23b32f4ad1014a3ebdb63cd137529557 Annales Geophysicae, Vol 19, Pp 1641-1653 (2001) Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 article 2001 ftdoajarticles https://doi.org/10.5194/angeo-19-1641-2001 2022-12-30T22:40:11Z We present a comparative study of the cusp region using the EISCAT Svalbard Radars (ESR) and the Cluster spacecraft. We focus in this paper on 2 February 2001, over the time period from 07:30 UT to 12:00 UT when the oblique ESR antenna pointing northward at a low elevation recorded latitudinal motions of the cusp region in response to the IMF. Meanwhile, the Cluster satellites were flying over the EISCAT Svalbard Radar field-of-view around local magnetic noon. The spacecraft first flew near ESR, northeast of Svalbard and then passed over the field-of-view of the antenna at about 11:30 UT. From 08:00 UT to 09:00 UT, the IMF remains primarily southward yet several variations in the Z -component are seen to move the cusp. Around 09:00 UT, an abrupt northward turning of the IMF moves the cusp region to higher latitudes. As a result, the Cluster satellites ended up in the northernmost boundary of the high-altitude cusp region where the CIS instrument recorded highly structured plasma due to ion injections in the lobe of the magnetosphere. After 09:00 UT, the IMF remains northward for more than two hours. Over this period, the ESR records sunward plasma flow in the cusp region due to lobe reconnection, while Cluster spacecraft remain in the high-altitude cusp. Key words. Magnetospheric physics (magnetopause, cusp, and boundary layers; plasma convection) Ionosphere (polar ionosphere) Article in Journal/Newspaper EISCAT Svalbard Directory of Open Access Journals: DOAJ Articles Svalbard Annales Geophysicae 19 10/12 1641 1653 |
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 F. Pitout J.-M. Bosqued D. Alcaydé W. F. Denig H. Rème Observations of the cusp region under northward IMF |
topic_facet |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 |
description |
We present a comparative study of the cusp region using the EISCAT Svalbard Radars (ESR) and the Cluster spacecraft. We focus in this paper on 2 February 2001, over the time period from 07:30 UT to 12:00 UT when the oblique ESR antenna pointing northward at a low elevation recorded latitudinal motions of the cusp region in response to the IMF. Meanwhile, the Cluster satellites were flying over the EISCAT Svalbard Radar field-of-view around local magnetic noon. The spacecraft first flew near ESR, northeast of Svalbard and then passed over the field-of-view of the antenna at about 11:30 UT. From 08:00 UT to 09:00 UT, the IMF remains primarily southward yet several variations in the Z -component are seen to move the cusp. Around 09:00 UT, an abrupt northward turning of the IMF moves the cusp region to higher latitudes. As a result, the Cluster satellites ended up in the northernmost boundary of the high-altitude cusp region where the CIS instrument recorded highly structured plasma due to ion injections in the lobe of the magnetosphere. After 09:00 UT, the IMF remains northward for more than two hours. Over this period, the ESR records sunward plasma flow in the cusp region due to lobe reconnection, while Cluster spacecraft remain in the high-altitude cusp. Key words. Magnetospheric physics (magnetopause, cusp, and boundary layers; plasma convection) Ionosphere (polar ionosphere) |
format |
Article in Journal/Newspaper |
author |
F. Pitout J.-M. Bosqued D. Alcaydé W. F. Denig H. Rème |
author_facet |
F. Pitout J.-M. Bosqued D. Alcaydé W. F. Denig H. Rème |
author_sort |
F. Pitout |
title |
Observations of the cusp region under northward IMF |
title_short |
Observations of the cusp region under northward IMF |
title_full |
Observations of the cusp region under northward IMF |
title_fullStr |
Observations of the cusp region under northward IMF |
title_full_unstemmed |
Observations of the cusp region under northward IMF |
title_sort |
observations of the cusp region under northward imf |
publisher |
Copernicus Publications |
publishDate |
2001 |
url |
https://doi.org/10.5194/angeo-19-1641-2001 https://doaj.org/article/23b32f4ad1014a3ebdb63cd137529557 |
geographic |
Svalbard |
geographic_facet |
Svalbard |
genre |
EISCAT Svalbard |
genre_facet |
EISCAT Svalbard |
op_source |
Annales Geophysicae, Vol 19, Pp 1641-1653 (2001) |
op_relation |
https://www.ann-geophys.net/19/1641/2001/angeo-19-1641-2001.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.5194/angeo-19-1641-2001 0992-7689 1432-0576 https://doaj.org/article/23b32f4ad1014a3ebdb63cd137529557 |
op_doi |
https://doi.org/10.5194/angeo-19-1641-2001 |
container_title |
Annales Geophysicae |
container_volume |
19 |
container_issue |
10/12 |
container_start_page |
1641 |
op_container_end_page |
1653 |
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1766400196687691776 |