Simulation of IMAGE Observations of a Substorm Injection on June 10, 2000

D.G. Mitchell, M.C. Fok, T.E. Moore, and P. Brandt

The High Energy Neutral Atom (HENA) instrument on the IMAGE spacecraft has
demonstrated gradient and curvature drift of ions injected into the outer
magnetosphere (L = 7) during a substorm [Mitchell et al., 2001]. Subsequent
simulation has shown that the details of the time history of the HENA images
can be closely reproduced using a kinetic ion transport model, for which the
plasma sheet ion distribution is specified and then particle trajectories at
all energies are traced in the magnetic and electric field configuration as
modeled by the Tsyganenko 1989 magnetic field and the Stern-Volland electric
field (both parametrized by Kp).  Results of this comparison will be shown.
In addition, an aspects of this event not previously stressed, namely the
broad local-time extent of the injected drifting ion cloud, will be
presented.

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Submitted to the Spring 2001 AGU Meeting, Boston, Massachusetts