Most recent GOES 15 observations
          Solar X-ray Flux Watts per meter squared
 UT Date   Time     ------ X-ray Flux (nanometer) -------
  YR MO DA HHMM      0.05-0.4      0.1-0.8       Ratio 
                      Short         Long         
 No Valid data for last 2 hours

The P2 and P5 channels can be approximately scaled to the EPHIN P4GM and P41GM rates. GOES P2 X 3.3 ~ P4GM, GOES P5 X 12 ~ P41GM.
Here we show the scaled RADMON limits, P4GM/3.3 and P41GM/12, on the plot.