AbstractPolar CAMMICE MICS data of proton pitch angle distributions with energies of 31–80 keV for the period of 1997–1998 were analyzed to determine the locations where anisotropic pitch angle distributions (perpendicular flux dominating) change to isotropic distributions. We study this high-altitude isotropic distribution boundary (IDB) in terms of its location in L-shell and MLT. Statistical results showed that this boundary is located at lower L-shells on the nightside and at higher L-shells on the dayside with most distant location at dawn. With the increase of magnetic activity, the IDB positions shift towards lower L-shells at all MLT. The locations of IDBs were also determined for different storm phases. A superposed epoch analysis revealed that the L-shells of the IDBs move to lower L-shells with decreasing Dst and to higher L-shells during Dst recovery. We made a comparison between Polar measurements of IDB at high altitudes and DMSP measurements of b2i boundary at low altitudes selecting several events during which simultaneous observations in the same local time sector were available. The magnetic field mapping using the Tsyganenko T01 model with the observed solar wind input parameters showed that Polar and DMSP were placed on nearly the same field lines, which leads us to suggest that the Polar IDB and the b2i boundary at DMSP are related.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Locations of proton isotropic boundaries as measured by conjugate high-altitude and low-altitude satellites


    Beteiligte:
    Ganushkina, N.Yu (Autor:in) / Karhunen, T (Autor:in) / Kubyshkina, M.V (Autor:in) / Ebihara, Y (Autor:in) / Sergeev, V.A (Autor:in) / Pulkkinen, T.I (Autor:in) / Fritz, T.A (Autor:in)

    Erschienen in:

    Advances in Space Research ; 31 , 5 ; 1265-1270


    Erscheinungsdatum :

    2002-01-01


    Format / Umfang :

    6 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



    Locations of Proton Isotropic Boundaries as Measured by Conjugate High-Altitude and Low-Altitude Satellites

    Ganushkina, N. Y. / Karhunen, T. / Kubyshkina, M. V. et al. | British Library Conference Proceedings | 2003



    Application of altitude control techniques for low altitude earth satellites

    Nickerson, K. G. / Herder, R. W. / Glass, A. B. et al. | NTRS | 1977


    Current leakage for low altitude satellites

    McCoy, J. / Konradi, A. / Garriott, O.K. | Tema Archiv | 1979


    Regular and chaotic motion of high altitude satellites

    Wytrzyszczak, I. / Breiter, S. / Borczyk, W. | Elsevier | 2006