HR: 1330h
AN: SM43C-02    [Abstracts]
TI: Modeling of Oxygen ions in inner plasma sheet during substorms
AU: * Jones, S T
EM: sjones@lepvax.gsfc.nasa.gov
AF: Heliospheric Physics Branch, NASA Goddard Space Flight Center, Greenbelt, MD 20771 United States
AU: Fok, M
EM: mei-ching.h.fok@nasa.gov
AF: Heliospheric Physics Branch, NASA Goddard Space Flight Center, Greenbelt, MD 20771 United States
AB: The HENA instrument on IMAGE has observed that during substorm onset significant increases in the Oxygen energetic neutral atom (ENA) signature, while relatively small change in the Hydrogen signature. To study this phenomenon, we use a particle trajectory simulation developed by Delcourt to study the response of magnetospheric Oxygen ions to dipolarization of the geomagnetic field. Geomagnetic dipolarization is represented by temporal interpolation of the Tsyganenko 89 model between high and low levels of magnetic activity. We compare analysis of HENA measurements and simulation results.
DE: 2753 Numerical modeling
DE: 2778 Ring current
DE: 2788 Storms and substorms
SC: SPA-Magnetospheric Physics [SM]
MN: 2005 Joint Assembly