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Simultaneous in-situ observations of the signature of dayside reconnection at the high and low latitude magnetopause

Wild, J. A. and Milan, S. E. and Cowley, S. W. H. and Bosqued, J. M. and Rème, H. and Nagai, T. and Kokubun, S. and Saito, Y. and Mukai, T. and Cooling, B. M. A. and Balogh, A. (2005) Simultaneous in-situ observations of the signature of dayside reconnection at the high and low latitude magnetopause. Annales Geophysicae, 23 (2). pp. 445-460. ISSN 0992-7689

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    Abstract

    We present magnetic field and particle data recorded by the Cluster and Geotail satellites in the vicinity of the high- and low-latitude dayside magnetopause, re- spectively, on 17 February 2003. A favourable conjunction of these spacecraft culminated in the observation of a series of flux transfer events (FTEs), characterised by bipolar perturbations in the component of the magnetic field normal to the magnetopause, an enhancement in the overall mag- netic field strength, and field tilting effects in the plane of the magnetopause whilst the satellites were located on the magnetosheath side of the boundary. Whilst a subset of the FTE signatures observed could be identified as being either normal or reverse polarity, the rapid succession of events observed made it difficult to classify some of the signatures unambiguously. Nevertheless, by considering the source region and motion of flux tubes opened by magnetic reconnection at low latitudes (i.e. between Cluster and Geotail), we demonstrate that the observations are consistent with the motion of northward (southward) and tailward moving flux tubes anchored in the Northern (Southern) Hemisphere passing in close proximity to the Cluster (Geotail) satellites. We are able to demonstrate that a multi-spacecraft approach, coupled with a realistic model of flux tube motion in the magnetosheath, enables us to infer the approximate position of the reconnection site, which in this case was located at near-equatorial latitudes.

    Item Type: Article
    Journal or Publication Title: Annales Geophysicae
    Uncontrolled Keywords: Cluster ; Double Star DCS-publications-id ; art-679 ; DCS-publications-credits ; iono-fa ; DCS-publications-personnel-id ; 104
    Subjects: T Technology > T Technology (General)
    Departments: Faculty of Science and Technology > School of Computing & Communications
    Faculty of Science and Technology > Physics
    ID Code: 6659
    Deposited By: ep_importer_dcs
    Deposited On: 21 Apr 2008 12:26
    Refereed?: Yes
    Published?: Published
    Last Modified: 26 Jul 2012 18:16
    Identification Number:
    URI: http://eprints.lancs.ac.uk/id/eprint/6659

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