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    Ionospheric and geomagnetic conditions during periods of degraded GPS position accuracy: 2 RTK events during disturbed and quiet geomagnetic conditions

    Authors
    Warnant, R.
    Kutiev, I.
    Marinov, P.
    Bavier, M.
    Lejeune, S.
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    Discipline
    Earth and related Environmental sciences
    Subject
    Middle-scale traveling ionospheric disturbances (MSTID)
    Real-time kinematics (RTK)
    Total electron content (TEC)
    Bottomside ion layers
    Audience
    General Public
    Scientific
    Date
    2007
    Publisher
    IRM
    KMI
    RMI
    Metadata
    Show full item record
    Description
    The paper analyzes the ionospheric conditions associated with strong RTK events observed during the strong geomagnetic storm on 31 March 2001 and on 16 January 2000, a day with very low geomagnetic activity. The analysis is based on ionograms obtained from ground-based ionosondes stations at Chilton (UK), Juliusruh (Germany), and Dourbes (Belgium). The storm onset on 31 March 2001 occurs at 0058UT followed by decreasing the F layer ionization and sharp increase of its height. At sunrise, a layer, classified as FO.5, tears off the normal F layer and start descending as the time develops. It merges the normal E layer about 2 h later. The second RTK event on that day, with larger intensities, occurs in association of a series of substorms in the afternoon hours. Then ionograms clearly show the presence of side reflections, interpreted as large-scale traveling ionospheric disturbances (LSTIDs). In the quiet period 16-19 January 2000, strong RTK events are observed to appear in the morning hours and disappear in afternoon. The behavior of the bottoms ide ionosphere on 16 January 2000 is analyzed in details. The E layer traces first appear on ionograms at height of 150 km instead of 100 km, as it usually happens. This layer, classified as E2layer, is accompanied in most of the cases examined with a "c" type Es layer, as they both descent to the height of the normal E layer within 2-3 h. The appearing of morning RTK events during winter months is suggested to reflect phenomena known in the literature as tidal ion layers and solar terminator associated processes.
    Citation
    Warnant, R.; Kutiev, I.; Marinov, P.; Bavier, M.; Lejeune, S. (2007). Ionospheric and geomagnetic conditions during periods of degraded GPS position accuracy: 2 RTK events during disturbed and quiet geomagnetic conditions. , Issue Advances in Space Research, p.881-888, IRM,
    Identifiers
    uri: https://orfeo.belnet.be/handle/internal/8748
    Type
    Article
    Peer-Review
    Not pertinent
    Language
    eng
    Links
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