Abstract Using the empirical terrestrial magnetospheric magnetic field models of Tsyganenko and Usmanov (TU) and Tsyganenko (T87), we determined the average field-aligned currents (FACs) in the magnetosphere as a function of the K p index. We identify three major model FAC systems; dayside region 1 (DR1), nightside region 1 (NR1), and nightside polar cap (NPC). The models provide information about the sources of the current systems. Mapped ionospheric model FACs are compared with low-altitude measurements obtained by the MAGSAT spacecraft. We find that low-altitude data can reveal either classic region 1 2 or more highly structured FAC patterns. We therefore expect statistical results, either obtained from observations or inferred from models, to be averages over temporally and spatially shifting patterns.


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    Titel :

    Comparison of field-aligned currents at ionospheric and magnetospheric altitudes


    Beteiligte:
    Spence, H.E. (Autor:in) / Kivelson, M.G. (Autor:in) / Walker, R.J. (Autor:in)

    Erschienen in:

    Advances in Space Research ; 8 , 9-10 ; 343-346


    Erscheinungsdatum :

    01.01.1989


    Format / Umfang :

    4 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



    Comparison of field-aligned currents at ionospheric and magnetospheric altitudes

    Spence, H. E. / Kivelson, M. G. / Walker, R. J. | NTRS | 1988


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    Burch, J.L. / Reiff, P.H. | Elsevier | 1985


    Field-aligned currents and ion convection at high altitudes

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    Observations of magnetospheric convection from low altitudes

    Heelis, R.A. / Reiff, P.H. | Elsevier | 1985


    Observations of magnetospheric convection from low altitudes

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