HR: 1330h
AN: SM43B-03    [Abstracts]
TI: Global Ring Current Ion Distributions Obtained by IMAGE/HENA DURING STORMS AND SUBSTORMS
AU: * Brandt, P C
EM: pontus.brandt@jhuapl.edu
AF: The Johns Hopkins University Applied Physics Laboratory, 11100 Johns Hopkins Rd, Laurel, md 20723 United States
AU: Ganushkina, N
EM: Nataly.Ganushkina@fmi.fi
AF: Finnish Meteorological Institute, PO Box 503 , Helsinki, Finland
AU: Zheng, Y
EM: yihua.zheng@jhuapl.edu
AF: The Johns Hopkins University Applied Physics Laboratory, 11100 Johns Hopkins Rd, Laurel, md 20723 United States
AU: Fok, M
EM: Mei-Ching.Fok@gsfc.nasa.gov
AF: NASA Goddard Space Flight Center, MC 692, Bldg 21, Rm 248 , Greenbelt, 20771 United States
AU: Mitchell, D G
EM: don.mitchell@jhuapl.edu
AF: The Johns Hopkins University Applied Physics Laboratory, 11100 Johns Hopkins Rd, Laurel, md 20723 United States
AU: DeMajistre, R
EM: robert.demajsitre@jhuapl.edu
AF: The Johns Hopkins University Applied Physics Laboratory, 11100 Johns Hopkins Rd, Laurel, md 20723 United States
AU: Roelof, E C
EM: ed.roelof@jhuapl.edu
AF: The Johns Hopkins University Applied Physics Laboratory, 11100 Johns Hopkins Rd, Laurel, md 20723 United States
AB: Global Energetic Neutral Atom (ENA) images of the Hydrogen and Oxygen ring current in the 10-200 keV range have been obtained by IMAGE/HENA for five years. Approximately 40 storms have been succesfully imaged. Over the years a constrained linear inversion technique has been developed that can retrieve the equatorial ring current ion distributions from the ENA images. It uses the Tsyganenko [2003] magnetic field model and assumes pitch-angle distributions based on in-situ data. We investigate the general morphology of the ring current during storm times with special attention to the question of how much the storm-time substorm injections contribute to the ring current pressure. We discuss and compare observations with ring current models.
DE: 2700 MAGNETOSPHERIC PHYSICS
DE: 2730 Magnetosphere--inner
DE: 2740 Magnetospheric configuration and dynamics
DE: 2778 Ring current
DE: 2788 Storms and substorms
SC: SPA-Magnetospheric Physics [SM]
MN: 2005 Joint Assembly