Physics – Plasma Physics
Scientific paper
Jun 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008jgra..11306207m&link_type=abstract
Journal of Geophysical Research, Volume 113, Issue A6, CiteID A06207
Physics
Plasma Physics
Magnetospheric Physics: Magnetic Reconnection (7526, 7835), Magnetospheric Physics: Electric Fields (2411), Magnetospheric Physics: Instruments And Techniques, Space Plasma Physics: Magnetic Reconnection (2723, 7526)
Scientific paper
Analyses of satellite-measured fields and flows through reconnecting current sheets have assumed that the relative velocity of the satellite and the current sheet is in the direction of the current sheet normal. During analyses, this relative normal velocity has been removed by translation of the satellite data. The assumption that the relative motion is along the normal may be invalid such that, in the satellite reference frame, the reconnection structure moves in the plane of the current sheet during the crossing. In this case, the fields and flows are not measured in the reconnection rest frame although they must be known in this frame for quantitative analyses of the reconnection data. Consequences of this slippage of the reconnection rest frame in the plane of the current sheet are investigated to show that errors may be large and that rotation (minimum variance, maximum variance, or Faraday Residue) or translation (to the normal incidence frame, the deHoffman-Teller frame, etc.) can exacerbate them. It is often the case that little can be done to guarantee a meaningful event analysis because of the insufficiency of the data collected in single satellite crossings of a reconnecting current sheet.
Cully C. M.
Mozer Forrest S.
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