Keywords: Ap8-omni-1.000MeV.png en Omnidirectional integral flux of protons >1MeV in the Van Allen belts AP8 Trapped Proton Environment for Solar Maximum and Solar Minimum US National Space Data Center 1976-12 PD-USGov Check categories 2009 April 24 en wikipedia Van_Allen_radiation_belt Earth Meteorology Space 3 Van Allen radiation belts |