Abstract Incoherent scatter data from non-thermal F-region ionospheric plasma are analysed, using theoretical spectra predicted by Raman et al. It is found that values of the semi-empirical drift parameter D, associated with deviations of the ion velocity distribution from a Maxwellian, and the plasma temperatures can be rigorously deduced (the results being independent of the path of iteration) if the angle between the line-of-sight and the geomagnetic field is larger than about 15–20 degrees. For small aspect angles, the deduced value of the average (or 3-D) ion temperature remains ambiguous and the analysis is restricted to the determination of the line-of-sight temperature because the theoretical spectrum is insensitive to non-thermal effects when the plasma is viewed along directions almost parallel to the magnetic field. This limitation is expected to apply to any realistic model of the ion velocity distribution, and its consequences are discussed. Fit strategies which allow for mixed ion composition are also considered. Examples of fits to data from various EISCAT observing programmes are presented.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Analysis of incoherent scatter spectra from non-Maxwellian plasma


    Beteiligte:
    Suvanto, K. (Autor:in) / Lockwood, M. (Autor:in) / Winser, K.J. (Autor:in) / Farmer, A.D. (Autor:in) / Bromage, B.J.I. (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    01.01.1989


    Format / Umfang :

    4 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch





    Incoherent Scatter Radars

    McCrea, I. W. / Lockwood, M. | British Library Online Contents | 1997


    Recent incoherent scatter techniques

    Sulzer, Michael P. | Elsevier | 1989


    Incoherent scatter radar contributions

    Oliver, W.L. / Alcaydé, D. / Bauer, P. | Elsevier | 1989