Dynamic Radiation Environment Assimilation Model(DREAM)
Dynamic Radiation Environment Assimilation Model, DREAM developed by Los Alamos National Laboratory, LANL
Fokker-Plank radial diffusion equation based implementation
DREAM Kp, Dst, solar speed, density, pressure, measurements in a geostationary orbit, real-time magnetic field value (T89) as real-time inputs
Output will be caculated in phase space density(PSD). Final output will be converted to electronic flux distribution at magnetosphere
Visualization of DREAM
First panel graph: The output of the DREAM model is an electron flux of 1 MeV and a pitch angle of 50 degrees. It shows the flux of the earth's radiation zone changes according to L * (y axis) and time (x axis) corresponding to distance from the earth. Color scales indicate that the closer to red the number of particles is, and the closer to blue the smaller the number of particles.
Second Panel Graph: Van Allen Probe This shows the real-time electron flux observed from the A satellite. It is represented by the same color scale as the first panel graph, and appears linearly as the value is expressed only on the orbit over which the satellite passes.
The third to fifth panel graphs show the speed of the solar wind, the predicted accuracy of the DREAM, MeV flux, and the Kp index, the geomagnetic disturbance index. The higher the velocity of the solar wind and the higher the Kp index, the larger the number of particles of the earth magnetism is expected.