This graph shows the latest available proton flux data from the NOAA GOES satellites, in four cumulative energy bands: ≥10 MeV, ≥50 MeV, ≥100 MeV and ≥500 MeV with flux thresholds (dashed lines) set at 10 pfu and 1 pfu respectively for ≥10 MeV and ≥100 MeV.

This is a direct measurement of solar energetic particles an fluxes above threshold increase the risk for SEUs in satellites at GEO, MEO, LEO and HEO orbits.