Last Updated: 12/08/2023


Version: 1.0

This software package includes (1) an improved and updated version of the old MODEL program (MODEL87), (2) an interactive driver program (RADBELT), (3) the electron AE-8 and proton AP-8 flux maps for solar maximum and minimum, and (4) the interpolation subroutines. RADBELT and MODEL87 compute omnidirectional, integral, or differential (in energy) fluxes of electrons and protons trapped in Earth's radiation for specified energy, L-value, and B/Bo range (B/Bo is magnetic field strength normalized to the equatorial value). The fluxes are obtained by an interpolation procedure from the AE-8 and AP-8 trapped particle flux maps. The RADBELT program allows the user to specify input parameters and options on line and generates flux tables that can be stored for later use.


  • Magnetosphere / Global Magnetosphere


  • D.M. Sawyer, J.I. Vette, AP-8 trapped proton environment for solar maximum and solar minimum (Goddard Space Flight Center, Greenbelt, Md, 1976). NASA WDC-A-R&S 76-06, NASA-TM-X-72605
  • J.I.Vette, Models of the Trapped Radiation Environment, Vol. I: Inner Zone Protons and Electrons, NASA SP-3024 (Goddard Space Flight Center, Greenbelt, MD, 1966)
  • J. I. Vette, "The AE-8 trapped electron model environment," NSSDC/WDC-A-R&S 91-24, 1991.


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