Numerical solutions to the time-dependent kinetic equation, which decribes the transport of superthermal electrons in the plasmasphere between the two conjugate ionospheres, are presented. The model calculates the distriution function as a function of time, field-aligned distance, energy, and pitch-angle. The processes of refilling, depleting, and establishing steady-state conditions of superthermal electrons in the plasmasphere are discussed. ¿ American Geophysical Union 1993