Equatorial electric field measurements by IMAGE EUV

Details Equatorial electric field measurements by IMAGE EUV Equatorial electric field measurements by IMAGE EUV

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agufmsm31b0759g&link_type=abstract

American Geophysical Union, Fall Meeting 2001, abstract #SM31B-0759

Physics

2700 Magnetospheric Physics, 2712 Electric Fields (2411), 2730 Magnetosphere: Inner, 2760 Plasma Convection, 2768 Plasmasphere

Scientific paper

Observations of the extreme ultraviolet imager (EUV) on the Imager for Magnetopause-to-Aurora Global Exploration (IMAGE) satellite often show distinctive features of the plasmasphere such as `tails,' `plasma voids,' `fingers,' `biteouts,' and `shoulders' that are identifiable from one time snapshot to the next. These features can be mapped down to the magnetic equatorial plane, and their time-dependent positions can be analyzed to yield an equatorial (radial and/or azimuthal) velocity measurement. Assuming that cold plasma motion is due to E-cross-B drift, the equatorial electric field can then be extracted from the velocity. We apply this technique to produce time-dependent electric field measurements for some intervals of IMAGE EUV data which contain one or more of the distinctive plasmaspheric features above.

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