Ion-dispersion and rapid electron fluctuations in the cusp: a case study
We present results from co-ordinated measurements with the low altitude REIMEI satellite and the ESR (EISCAT Svalbard Radar), together with other ground-based instruments carried out in February 2006. The results mainly relate to the dayside cusp where clear signatures of so-called ion-dispersion ar...
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ftdoajarticles:oai:doaj.org/article:695a36fd8cbe4ec18d55391bb2bc9a41 2023-05-15T16:04:43+02:00 Ion-dispersion and rapid electron fluctuations in the cusp: a case study J. Lunde S. C. Buchert Y. Ogawa M. Hirahara K. Seki Y. Ebihara T. Sakanoi K. Asamura M. Okada T. Raita I. Häggström 2008-08-01T00:00:00Z https://doi.org/10.5194/angeo-26-2485-2008 https://doaj.org/article/695a36fd8cbe4ec18d55391bb2bc9a41 EN eng Copernicus Publications https://www.ann-geophys.net/26/2485/2008/angeo-26-2485-2008.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.5194/angeo-26-2485-2008 0992-7689 1432-0576 https://doaj.org/article/695a36fd8cbe4ec18d55391bb2bc9a41 Annales Geophysicae, Vol 26, Pp 2485-2502 (2008) Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 article 2008 ftdoajarticles https://doi.org/10.5194/angeo-26-2485-2008 2022-12-31T01:38:37Z We present results from co-ordinated measurements with the low altitude REIMEI satellite and the ESR (EISCAT Svalbard Radar), together with other ground-based instruments carried out in February 2006. The results mainly relate to the dayside cusp where clear signatures of so-called ion-dispersion are seen in the satellite data. The cusp ion-dispersion is important for helping to understand the temporal and spatial structure of magnetopause reconnection. Whenever a satellite crosses boundaries of flux tubes or convection cells, cusp structures such as ion-dispersion will always be encountered. In our case we observed 3 distinct steps in the ion energy, but it includes at least 2 more steps as well, which we interpret as temporal features in relation to pulsed reconnection at the magnetopause. In addition, fast variations of the electron flux and energy occurring during these events have been studied in detail. The variations of the electron population, if interpreted as structures crossed by the REIMEI satellite, would map near the magnetopause to similar features as observed previously with the Cluster satellites. These were explained as Alfvén waves originating from an X-line of magnetic reconnection. Article in Journal/Newspaper EISCAT Svalbard Directory of Open Access Journals: DOAJ Articles Svalbard Annales Geophysicae 26 8 2485 2502 |
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Open Polar |
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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 J. Lunde S. C. Buchert Y. Ogawa M. Hirahara K. Seki Y. Ebihara T. Sakanoi K. Asamura M. Okada T. Raita I. Häggström Ion-dispersion and rapid electron fluctuations in the cusp: a case study |
topic_facet |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 |
description |
We present results from co-ordinated measurements with the low altitude REIMEI satellite and the ESR (EISCAT Svalbard Radar), together with other ground-based instruments carried out in February 2006. The results mainly relate to the dayside cusp where clear signatures of so-called ion-dispersion are seen in the satellite data. The cusp ion-dispersion is important for helping to understand the temporal and spatial structure of magnetopause reconnection. Whenever a satellite crosses boundaries of flux tubes or convection cells, cusp structures such as ion-dispersion will always be encountered. In our case we observed 3 distinct steps in the ion energy, but it includes at least 2 more steps as well, which we interpret as temporal features in relation to pulsed reconnection at the magnetopause. In addition, fast variations of the electron flux and energy occurring during these events have been studied in detail. The variations of the electron population, if interpreted as structures crossed by the REIMEI satellite, would map near the magnetopause to similar features as observed previously with the Cluster satellites. These were explained as Alfvén waves originating from an X-line of magnetic reconnection. |
format |
Article in Journal/Newspaper |
author |
J. Lunde S. C. Buchert Y. Ogawa M. Hirahara K. Seki Y. Ebihara T. Sakanoi K. Asamura M. Okada T. Raita I. Häggström |
author_facet |
J. Lunde S. C. Buchert Y. Ogawa M. Hirahara K. Seki Y. Ebihara T. Sakanoi K. Asamura M. Okada T. Raita I. Häggström |
author_sort |
J. Lunde |
title |
Ion-dispersion and rapid electron fluctuations in the cusp: a case study |
title_short |
Ion-dispersion and rapid electron fluctuations in the cusp: a case study |
title_full |
Ion-dispersion and rapid electron fluctuations in the cusp: a case study |
title_fullStr |
Ion-dispersion and rapid electron fluctuations in the cusp: a case study |
title_full_unstemmed |
Ion-dispersion and rapid electron fluctuations in the cusp: a case study |
title_sort |
ion-dispersion and rapid electron fluctuations in the cusp: a case study |
publisher |
Copernicus Publications |
publishDate |
2008 |
url |
https://doi.org/10.5194/angeo-26-2485-2008 https://doaj.org/article/695a36fd8cbe4ec18d55391bb2bc9a41 |
geographic |
Svalbard |
geographic_facet |
Svalbard |
genre |
EISCAT Svalbard |
genre_facet |
EISCAT Svalbard |
op_source |
Annales Geophysicae, Vol 26, Pp 2485-2502 (2008) |
op_relation |
https://www.ann-geophys.net/26/2485/2008/angeo-26-2485-2008.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.5194/angeo-26-2485-2008 0992-7689 1432-0576 https://doaj.org/article/695a36fd8cbe4ec18d55391bb2bc9a41 |
op_doi |
https://doi.org/10.5194/angeo-26-2485-2008 |
container_title |
Annales Geophysicae |
container_volume |
26 |
container_issue |
8 |
container_start_page |
2485 |
op_container_end_page |
2502 |
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1766400350486528000 |