High-latitude dayside ionosphere response to Pc5 field line resonance
We report observations of pulsations due to Field Line Resonance (FLR) in the morning sector of the high-latitude dayside ionosphere on 1 February 1998. The Geotail spacecraft, ideally skimming the dayside magnetopause, monitored the magnetopause motion, which is seen to induce a modulated response...
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ftdoajarticles:oai:doaj.org/article:90bb30f17a004910936658e6e0e0c5b7 2023-05-15T16:04:43+02:00 High-latitude dayside ionosphere response to Pc5 field line resonance F. Pitout P. Eglitis P.-L. Blelly 2003-07-01T00:00:00Z https://doi.org/10.5194/angeo-21-1509-2003 https://doaj.org/article/90bb30f17a004910936658e6e0e0c5b7 EN eng Copernicus Publications https://www.ann-geophys.net/21/1509/2003/angeo-21-1509-2003.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.5194/angeo-21-1509-2003 0992-7689 1432-0576 https://doaj.org/article/90bb30f17a004910936658e6e0e0c5b7 Annales Geophysicae, Vol 21, Pp 1509-1520 (2003) Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 article 2003 ftdoajarticles https://doi.org/10.5194/angeo-21-1509-2003 2022-12-30T22:08:40Z We report observations of pulsations due to Field Line Resonance (FLR) in the morning sector of the high-latitude dayside ionosphere on 1 February 1998. The Geotail spacecraft, ideally skimming the dayside magnetopause, monitored the magnetopause motion, which is seen to induce a modulated response of the ionosphere by means of ULF waves. Pulsations in the Pc5 frequency range were observed in the ground magnetic field measured by the IMAGE array, as well as in the electron and ion temperatures measured by the EISCAT Svalbard Radar. The ion temperature oscillations are an indicator of a modulated convection electric field while field-aligned currents (FAC) associated with the FLR control the electron temperature. We have performed a simulation of the ionosphere experiencing sinusoidal FAC and electric field in order to confirm our hypothesis. In addition to the ionospheric response, the possible cause of the FLR and processes involved are also discussed. Key words. Magnetospheric physics (MHD waves and instabilities; magnetosphere-ionosphere interactions) – Ionosphere (polar ionosphere) Article in Journal/Newspaper EISCAT Svalbard Directory of Open Access Journals: DOAJ Articles Svalbard Annales Geophysicae 21 7 1509 1520 |
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 P. Eglitis P.-L. Blelly High-latitude dayside ionosphere response to Pc5 field line resonance |
topic_facet |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 |
description |
We report observations of pulsations due to Field Line Resonance (FLR) in the morning sector of the high-latitude dayside ionosphere on 1 February 1998. The Geotail spacecraft, ideally skimming the dayside magnetopause, monitored the magnetopause motion, which is seen to induce a modulated response of the ionosphere by means of ULF waves. Pulsations in the Pc5 frequency range were observed in the ground magnetic field measured by the IMAGE array, as well as in the electron and ion temperatures measured by the EISCAT Svalbard Radar. The ion temperature oscillations are an indicator of a modulated convection electric field while field-aligned currents (FAC) associated with the FLR control the electron temperature. We have performed a simulation of the ionosphere experiencing sinusoidal FAC and electric field in order to confirm our hypothesis. In addition to the ionospheric response, the possible cause of the FLR and processes involved are also discussed. Key words. Magnetospheric physics (MHD waves and instabilities; magnetosphere-ionosphere interactions) – Ionosphere (polar ionosphere) |
format |
Article in Journal/Newspaper |
author |
F. Pitout P. Eglitis P.-L. Blelly |
author_facet |
F. Pitout P. Eglitis P.-L. Blelly |
author_sort |
F. Pitout |
title |
High-latitude dayside ionosphere response to Pc5 field line resonance |
title_short |
High-latitude dayside ionosphere response to Pc5 field line resonance |
title_full |
High-latitude dayside ionosphere response to Pc5 field line resonance |
title_fullStr |
High-latitude dayside ionosphere response to Pc5 field line resonance |
title_full_unstemmed |
High-latitude dayside ionosphere response to Pc5 field line resonance |
title_sort |
high-latitude dayside ionosphere response to pc5 field line resonance |
publisher |
Copernicus Publications |
publishDate |
2003 |
url |
https://doi.org/10.5194/angeo-21-1509-2003 https://doaj.org/article/90bb30f17a004910936658e6e0e0c5b7 |
geographic |
Svalbard |
geographic_facet |
Svalbard |
genre |
EISCAT Svalbard |
genre_facet |
EISCAT Svalbard |
op_source |
Annales Geophysicae, Vol 21, Pp 1509-1520 (2003) |
op_relation |
https://www.ann-geophys.net/21/1509/2003/angeo-21-1509-2003.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.5194/angeo-21-1509-2003 0992-7689 1432-0576 https://doaj.org/article/90bb30f17a004910936658e6e0e0c5b7 |
op_doi |
https://doi.org/10.5194/angeo-21-1509-2003 |
container_title |
Annales Geophysicae |
container_volume |
21 |
container_issue |
7 |
container_start_page |
1509 |
op_container_end_page |
1520 |
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1766400337476845568 |