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Observing the north polar ionosphere on 30 October 2003 by GPS imaging and IS radars

Stolle, Claudia and Lilensten, Jean and Schlüter, Stefan and Jacobi, Christoph and Rietveld, Michael and Lühr, Hermann (2006) Observing the north polar ionosphere on 30 October 2003 by GPS imaging and IS radars. Annales Geophysicae, 24, pp. 107-113. European Geosciences Union.

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The evening of 30 October 2003 was subject to a major storm main phase. For this time, we combine largescale 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 20:00 UT. In combination with the radar observations we concluded that the TOI persisted during the whole period of continuous southward IMF Bz until about 22:40 UT while its largest extension toward the nightside auroral region was found between 21:00–22:00 UT. A typical F region electron temperature of ~2000K and the plasma velocity of ~800 ms<sup>−1</sup> 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 Bz the nightside plasma density was observed to re-enhance after 23:00 UT along a longitudinal band below 70°N. Coinciding electron temperatures of ~2000K suggest again the convective nature of the plasma, while a modified convection pattern is expected.

Item URL in elib:https://elib.dlr.de/22873/
Document Type:Article
Title:Observing the north polar ionosphere on 30 October 2003 by GPS imaging and IS radars
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Stolle, ClaudiaGFZ PotzdamUNSPECIFIED
Lilensten, JeanLaboratoire de Planetologie de GrenobleUNSPECIFIED
Jacobi, ChristophUNI LeipzigUNSPECIFIED
Lühr, HermannGFZ PotzdamUNSPECIFIED
Journal or Publication Title:Annales Geophysicae
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 107-113
Publisher:European Geosciences Union
Keywords:Polar ionosphere, Ionospheric disturbances, Plasma convection
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EW - Erforschung des Weltraums
DLR - Research area:Space
DLR - Program:W EW - Erforschung des Weltraums
DLR - Research theme (Project):W - Vorhaben Weltraumwetter (old)
Location: other
Institutes and Institutions:Institute of Communication and Navigation > Navigation > Navigation and Control Systems
Deposited By: Schlüter, Dr.rer.nat. Stefan
Deposited On:28 Mar 2006
Last Modified:27 Apr 2009 05:04

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