Observing the north polar ionosphere on 30 October 2003 by GPS imaging and IS radars
The evening of 30October 2003 was subject to a major storm main phase. For this time, we combine large-scale electron content maps from GPS imaging with time series of electron density and temperature of two EISCAT radars in Tromsø and Svalbard and the Sondrestrom radar, for observing the north pola...
Published in: | Annales Geophysicae |
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Online Access: | https://doi.org/10.5194/angeo-24-107-2006 https://angeo.copernicus.org/articles/24/107/2006/ |
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ftcopernicus:oai:publications.copernicus.org:angeo35713 2023-05-15T16:04:45+02:00 Observing the north polar ionosphere on 30 October 2003 by GPS imaging and IS radars Stolle, C. Lilensten, J. Schlüter, S. Jacobi, Ch. Rietveld, M. Lühr, H. 2018-09-27 application/pdf https://doi.org/10.5194/angeo-24-107-2006 https://angeo.copernicus.org/articles/24/107/2006/ eng eng doi:10.5194/angeo-24-107-2006 https://angeo.copernicus.org/articles/24/107/2006/ eISSN: 1432-0576 Text 2018 ftcopernicus https://doi.org/10.5194/angeo-24-107-2006 2020-07-20T16:27:18Z The evening of 30October 2003 was subject to a major storm main phase. For this time, we combine large-scale electron content maps from GPS imaging with time series of electron density and temperature of two EISCAT radars in Tromsø and Svalbard and the Sondrestrom radar, for observing the north polar ionosphere. The GPS assimilations resulted in the image of the electron content trace of an anti-sunward polar Tongue Of Ionisation (TOI) consecutively to 20:00UT. In combination with the radar observations we concluded that the TOI persisted during the whole period of continuous southward IMF B z until about 22:40UT while its largest extension toward the nightside auroral region was found between 21:00-22:00UT. A typical Fregion electron temperature of ~2000 K and the plasma velocity of ~800 ms -1 support its convective origin from the dayside mid-latitudes. Due to the structured appearance of the electron content distribution and the radar electron density time series we believe that discrete plasma patches formed inside the anti-sunward drift pattern. After two large oscillations of the IMF B z the nightside plasma density was observed to re-enhance after 23:00UT along a longitudinal band below 70 N. Coinciding electron temperatures of ~2000 K suggest again the convective nature of the plasma, while a modified convection pattern is expected. Text EISCAT Svalbard Tromsø Copernicus Publications: E-Journals Svalbard Tromsø Annales Geophysicae 24 1 107 113 |
institution |
Open Polar |
collection |
Copernicus Publications: E-Journals |
op_collection_id |
ftcopernicus |
language |
English |
description |
The evening of 30October 2003 was subject to a major storm main phase. For this time, we combine large-scale electron content maps from GPS imaging with time series of electron density and temperature of two EISCAT radars in Tromsø and Svalbard and the Sondrestrom radar, for observing the north polar ionosphere. The GPS assimilations resulted in the image of the electron content trace of an anti-sunward polar Tongue Of Ionisation (TOI) consecutively to 20:00UT. In combination with the radar observations we concluded that the TOI persisted during the whole period of continuous southward IMF B z until about 22:40UT while its largest extension toward the nightside auroral region was found between 21:00-22:00UT. A typical Fregion electron temperature of ~2000 K and the plasma velocity of ~800 ms -1 support its convective origin from the dayside mid-latitudes. Due to the structured appearance of the electron content distribution and the radar electron density time series we believe that discrete plasma patches formed inside the anti-sunward drift pattern. After two large oscillations of the IMF B z the nightside plasma density was observed to re-enhance after 23:00UT along a longitudinal band below 70 N. Coinciding electron temperatures of ~2000 K suggest again the convective nature of the plasma, while a modified convection pattern is expected. |
format |
Text |
author |
Stolle, C. Lilensten, J. Schlüter, S. Jacobi, Ch. Rietveld, M. Lühr, H. |
spellingShingle |
Stolle, C. Lilensten, J. Schlüter, S. Jacobi, Ch. Rietveld, M. Lühr, H. Observing the north polar ionosphere on 30 October 2003 by GPS imaging and IS radars |
author_facet |
Stolle, C. Lilensten, J. Schlüter, S. Jacobi, Ch. Rietveld, M. Lühr, H. |
author_sort |
Stolle, C. |
title |
Observing the north polar ionosphere on 30 October 2003 by GPS imaging and IS radars |
title_short |
Observing the north polar ionosphere on 30 October 2003 by GPS imaging and IS radars |
title_full |
Observing the north polar ionosphere on 30 October 2003 by GPS imaging and IS radars |
title_fullStr |
Observing the north polar ionosphere on 30 October 2003 by GPS imaging and IS radars |
title_full_unstemmed |
Observing the north polar ionosphere on 30 October 2003 by GPS imaging and IS radars |
title_sort |
observing the north polar ionosphere on 30 october 2003 by gps imaging and is radars |
publishDate |
2018 |
url |
https://doi.org/10.5194/angeo-24-107-2006 https://angeo.copernicus.org/articles/24/107/2006/ |
geographic |
Svalbard Tromsø |
geographic_facet |
Svalbard Tromsø |
genre |
EISCAT Svalbard Tromsø |
genre_facet |
EISCAT Svalbard Tromsø |
op_source |
eISSN: 1432-0576 |
op_relation |
doi:10.5194/angeo-24-107-2006 https://angeo.copernicus.org/articles/24/107/2006/ |
op_doi |
https://doi.org/10.5194/angeo-24-107-2006 |
container_title |
Annales Geophysicae |
container_volume |
24 |
container_issue |
1 |
container_start_page |
107 |
op_container_end_page |
113 |
_version_ |
1766400382881234944 |