Large-scale ionospheric gradients over Europe observed in October 2003
Jakowski, Norbert and Mielich, Jens and Borries, Claudia and Cander, Ljiljana and Krankowski, Andrzej and Nava, Bruno and Stankov, Stanimir M. (2008) Large-scale ionospheric gradients over Europe observed in October 2003. Journal of Atmospheric and Solar-Terrestrial Physics, 70 (15), pp. 1894-1903. Elsevier Ltd. DOI: doi:10.1016/j.jastp.2008.03.020.
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It is well known that ionospheric perturbations are characterised by strong horizontal gradients and rapid changes of the ionisation. Thus, space weather induced severe ionosphere perturbations can cause serious technological problems in Global Navigation Satellite Systems (GNSS) such as GPS. During the severe ionosphere storm period of 29–31 October 2003, reported were several significant malfunctions due to the adverse effects of the ionosphere perturbations such as interruption of the WAAS service and degradation of mid-latitudes GPS reference services. To properly warn service users of such effects, a quick evaluation of the current signal propagation conditions expressed in a suitable ionospheric perturbation index would be of great benefit. Preliminary results of a comparative study of ionospheric gradients including vertical sounding and Total Electron Content (TEC) data are presented. Strong enhancements of latitudinal gradients and temporal changes of the ionisation are observed over Europe during the 29–30 October storm period. The potential use of spatial gradients and rate of change of foF2 and TEC characterising the actual perturbation degree of the ionosphere is discussed. It has been found that perturbation induced spatial gradients of TEC and foF2 strongly enhance during the ionospheric storm on 29 October over the Central European region in particular in North–South direction exceeding the gradients in East–West direction by a factor of 2.
|Title:||Large-scale ionospheric gradients over Europe observed in October 2003|
|Journal or Publication Title:||Journal of Atmospheric and Solar-Terrestrial Physics|
|In ISI Web of Science:||Yes|
|Page Range:||pp. 1894-1903|
|Keywords:||Ionosphere; Perturbations; Ionosonde; GPS|
|HGF - Research field:||Aeronautics, Space and Transport|
|HGF - Program:||Space|
|HGF - Program Themes:||W EO - Erdbeobachtung|
|DLR - Research area:||Space|
|DLR - Program:||W EO - Erdbeobachtung|
|DLR - Research theme (Project):||W - Vorhaben Ionosphärenerkundung (old)|
|Institutes and Institutions:||Institute of Communication and Navigation|
|Deposited By:||Dr.rer.nat. Norbert Jakowski|
|Deposited On:||08 Dec 2008|
|Last Modified:||27 Apr 2009 15:34|
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