Dusk-side Outer Plasmaspheric Structure Observed in Global Images and In-situ

M. Spasojevic, J. Goldstein, D. L. Carpenter, U. S. Inan
B. R. Sandel, B. W. Reinisch, R. R. Anderson


The Extreme Ultraviolet Imager (EUV) onboard the IMAGE spacecraft is
providing the first global images of the structure and dynamics of the
Earth's plasmasphere.  Much of the past plasmaspheric research has relied
on in-situ electron density measurements derived from radio-wave
dynamic spectra which can provide high resolution, quantitative data but
leave unanswered questions as to the global nature of the observed
structure. We present a comparison of EUV global images of outer
plasmaspheric structure in the dusk sector, including plasmatails,
with 2-minute resolution dynamic spectra obtained by the Radio Plasma
Imager on IMAGE.  We can then use this comparison as a basis for further
interpretation of the higher time resolution (8-second) measurements of
electron density made by similiar technique by the CRRES satellite in
1990-1991.

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To be presented at the 2002 Spring A.G.U. Meeting, 
Washington, D.C., U.S.A., 28-31 May 2002