Physics
Scientific paper
Dec 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agufmsm21d..05m&link_type=abstract
American Geophysical Union, Fall Meeting 2002, abstract #SM21D-05
Physics
2722 Forecasting, 2740 Magnetospheric Configuration And Dynamics, 2744 Magnetotail, 2764 Plasma Sheet, 2788 Storms And Substorms
Scientific paper
This study shows the first energetic neutral atom (ENA) observations of the extended plasma sheet, taken with the Medium Energy Neutral Atom (MENA) imager on the IMAGE spacecraft. We show that ENA emissions can be routinely observed back to several tens of RE deep in the magnetotail when IMAGE is in an appropriate orbital position. Enhanced emissions (high plasma sheet densities) are associated with high solar wind densities and with super dense plasma sheet observations at geosynchronous orbit. We examine two magnetospheric storm intervals where plasma sheet loading begins prior to the storms and continues under all IMF BZ orientations, reaching its maximum during the peaks of the storms. Subsequently, ENA emissions are weak indicating that the plasma sheet is depleted for several days following these storms. This study indicates that routine ENA observations of the plasma sheet content could become an important part of space weather monitoring.
Burch James. L.
McComas David John
Pollock C. J.
Skoug Ruth M.
Thomsen Michelle F.
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