HR: 14:00h
AN: SH52A-02    [PDF]
TI: A Radiation Belt Forecasting Model
AU: * Fok, M
EM: mei-ching.h.fok@nasa.gov
AF: NASA Goddard Space Flight Center, Code 692, Greenbelt, MD 20771 United States
AU: Khazanov, G V
EM: george.khazanov@msfc.nasa.gov
AF: NASA Marshall Space Flight Center, National Space Science and Technology Center, 320 Sparkman Drive, Huntsville, AL 35805 United States
AU: Webb, P A
EM: Phillip.webb@gsfc.nasa.gov
AF: NASA Goddard Space Flight Center, Code 692, Greenbelt, MD 20771 United States
AU: Ober, D M
EM: Daniel.ober@mrcnh.com
AF: Mission Research Corporation, 589 West Hollis Street Suite 201, Nashua, NH 03062 United States
AB: While there are existing models that specify and forecast the radiation belt environment, hardly any of them covers the entire radiation belt region and energy range. We have developed a forecasting model to predict the global radiation belt environment. The model is a data-driven physics-based model, which solves the bounce averaged convection-diffusion equation of plasma distribution functions in the ranges of 2-10 earth radii and 10 keV to 5 MeV energy. The effects of fluctuating magnetic and electric fields in particle transport, energy and pitch-angle diffusions due to wave-particle interactions are included in the model. A plasmasphere model is also embedded in the forecasting model to specify the cold plasma distribution for wave diffusion coefficient calculations. Simulation results of several magnetic storms suggest that the inductive electric field associated with time-varying magnetic field and energy diffusion as plasmas interacting with the whistler chorus are potential mechanisms to explain the electron enhancements often seen during storm recovery phases.
DE: 2100 INTERPLANETARY PHYSICS
DE: 2400 IONOSPHERE
DE: 2700 MAGNETOSPHERIC PHYSICS
DE: 7500 SOLAR PHYSICS, ASTROPHYSICS, AND ASTRONOMY
DE: 7800 SPACE PLASMA PHYSICS
SC: SPA - Solar and Heliospheric Physics [SH]
MN: 2003 Fall Meeting