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    Large-scale ionospheric gradients over Europe observed in October 2003

    Authors
    Jakowski, N.
    Mielich, J.
    Borries, C.
    Cander, L.
    Krankowski, A.
    Nava, B.
    Stankov, S.M.
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    Discipline
    Earth and related Environmental sciences
    Subject
    Ionosphere
    Perturbations
    Ionosonde
    GPS
    Audience
    General Public
    Scientific
    Date
    2008
    Publisher
    IRM
    KMI
    RMI
    Metadata
    Show full item record
    Description
    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.
    Citation
    Jakowski, N.; Mielich, J.; Borries, C.; Cander, L.; Krankowski, A.; Nava, B.; Stankov, S.M. (2008). Large-scale ionospheric gradients over Europe observed in October 2003. , Issue 0, pp. 1894–1903, IRM,
    Identifiers
    uri: https://orfeo.belnet.be/handle/internal/8773
    Type
    Article
    Peer-Review
    Not pertinent
    Language
    eng
    Links
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