Peak intensities of time profiles, recorded from observations (circles) and numerical simulations (diamonds). Observers are placed on the x-axis according to footpoint longitudinal distance from the flare. Peak intensities inferred from observations excluded time periods with ESP effects. For MSL/RAD, in addition to the recorded intensities, we show as a black square a version of the 60–100 MeV proton channel, with preliminary first-order corrections for energy losses due to spacecraft shielding.