These 5-min proton fluxes are from eastward- and westward-looking sensors on the Space Environment Monitoring package on GOES 13, at 74 deg west longitude. "Av" refers to an average over the E and W fluxes. E and W data are taken from http://satdat.ngdc.noaa.gov/sem/goes/data/new_avg/
Time span: 2011-01-01 to 2013-05-05