Physics
Scientific paper
May 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agusm..sm32a23s&link_type=abstract
American Geophysical Union, Spring Meeting 2001, abstract #SM32A-23
Physics
2730 Magnetosphere--Inner, 2760 Plasma Convection, 2768 Plasmasphere, 2788 Storms And Substorms
Scientific paper
We investigate complex spatial structures within the plasmasphere, with the goal of improving our understanding of the relationships among them. With our new ability to determine the distribution of cold plasma near Earth, it is not surprising that many structures have appeared that had not previously been specifically addressed by theory and modeling efforts. Now modeling of some of these structures is underway, so a better understanding of them is needed. We focus on the possible relationships among time-variable structures such as convection tails, large-scale scallops in the shape of the plasmapause, azimuthal channels of low density in the pre-midnight sector, and possible departures from corotation in the same region. The observations that we use here come from the Extreme Ultraviolet Imager (EUV) of the IMAGE Mission. Encompassing the entire plasmasphere in a single frame, EUV records the spatial distribution of He+ with a time resolution of 10~minutes and a spatial resolution of 0.1~R E or better. EUV measures the brightness of 30.4-nm sunlight resonantly scattered by He+ surrounding Earth.
Forrester William T.
King Andrew R.
Sandel Bill R.
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