The Relationship Between Proton Aurora and Trapped Ion Flux as Seen by IMAGE

Perez, J. D., X.-X Zhang, P. C:son Brandt, D. G. Mitchell, J.-M. Jahn, 
C. J. Pollock, and S. B. Mende


The FUV/SI12 instrument on board the IMAGE satellite provides global
observations of proton produced aurora. The MENA and HENA instruments on
IMAGE provide global energetic neutral atom images that can be inverted to
obtain equatorial flux distributions of trapped ring current protons. 
Mapping the equatorial distributions of trapped protons along magnetic field
lines to the polar cap where the proton auroras are observed allows direct
comparison of the location of the two populations.  Such comparisons for
10:00-13:45 UT on August 12, 2000, 00:00-5:45 UT on June 2, 2001, and
13:00-16:45 on June 18, 2001 show a strong correlation between the location
of the 8.5 keV trapped proton flux observed by MENA and the precipitating
protons observed by FUV/SI12 but an anti-correlation between the 33 keV
trapped protons observed by HENA and the FUV/SI12 observations.  Possible
explanations of these observations will also be presented. 

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Presentation, Fall Meeting, American Geophysical Union, San Francisco, USA, 
8-12 December 2003