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    Real-time imaging of density ducts between the plasmasphere and ionosphere

    231982_231982.pdf (823.4Kb)
    Access Status
    Open access
    Authors
    Loi, S.
    Murphy, T.
    Cairns, I.
    Menk, F.
    Waters, C.
    Erickson, P.
    Trott, C.
    Hurley-Walker, Natasha
    Morgan, John
    Lenc, E.
    Offringa, A.
    Bell, M.
    Ekers, R.
    Gaensler, B.
    Lonsdale, C.
    Feng, L.
    Hancock, Paul
    Kaplan, D.
    Bernardi, G.
    Bowman, J.
    Briggs, F.
    Cappallo, R.
    Deshpande, A.
    Greenhill, L.
    Hazelton, B.
    Johnston-Hollitt, M.
    Mcwhirter, S.
    Mitchell, D.
    Morales, M.
    Morgan, E.
    Oberoi, D.
    Ord, Stephen
    Prabu, T.
    Shankar, N.
    Srivani, K.
    Subrahmanyan, R.
    Tingay, Steven
    Wayth, Randall
    Webster, R.
    Williams, A.
    Williams, C.
    Date
    2015
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Loi, S. and Murphy, T. and Cairns, I. and Menk, F. and Waters, C. and Erickson, P. and Trott, C. et al. 2015. Real-time imaging of density ducts between the plasmasphere and ionosphere. Geophysical Research Letters. 42 (10): pp. 3707-3714.
    Source Title
    Geophysical Research Letters
    DOI
    10.1002/2015GL063699
    ISSN
    0094-8276
    School
    Curtin Institute of Radio Astronomy (Engineering)
    URI
    http://hdl.handle.net/20.500.11937/6774
    Collection
    • Curtin Research Publications
    Abstract

    Ionization of the Earth's atmosphere by sunlight forms a complex, multilayered plasma environment within the Earth's magnetosphere, the innermost layers being the ionosphere and plasmasphere. The plasmasphere is believed to be embedded with cylindrical density structures (ducts) aligned along the Earth's magnetic field, but direct evidence for these remains scarce. Here we report the first direct wide-angle observation of an extensive array of field-aligned ducts bridging the upper ionosphere and inner plasmasphere, using a novel ground-based imaging technique. We establish their heights and motions by feature tracking and parallax analysis. The structures are strikingly organized, appearing as regularly spaced, alternating tubes of overdensities and underdensities strongly aligned with the Earth's magnetic field. These findings represent the first direct visual evidence for the existence of such structures.

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