Preliminary Results of 4-Dimensional Radiation Belt Simulation With the VERB Code

Highly energetic electrons in the Earth's radiation belts are hazardous for satellite equipment. The dynamics of the radiation belt electrons can be described by the Fokker-Plank equation in terms of the radial distance, energy, and equatorial pitch-angle combined with magnetospheric convection model, which provides low energy electron seed population for Earth's radiation belts and is important for understanding of the radiation belts storm time and quite time variations. To better understand the global magnetospheric dynamics we present preliminary results of the combined convective-diffusive 4-dimentional simulations produced with 4-D Versatile Electron Radiation Belt (VERB) code. The simulations include radial diffusion due to ULF waves, energy, and pitch angle scattering due to day- and night-side chorus waves at high and low latitudes, plasmaspheric hiss waves, losses to magnetopause and atmosphere. Radial and azimuthal bounce-averaged electron drifts due to the influence of electric and magnetic fields are calculated to provide realistic low-energy electrons seed population during the simulation.