aareadme for
https://spdf.gsfc.nasa.gov/pub/data/imp/imp8/particles_uchi/hourly/protons/

Most needed information is in readme files higher in the
subdirectory tree.  The following proton-specific
information is from the headers of each UNH-resident
monthly file of proton count rates.

Flux Data are contained in columnar form with each column as:

   Column 01: YEAR
   Column 02: DAY OF YEAR
   Column 03: HOUR OF DAY
   Column 04: COVERAGE (PERCENT)
   Column 05: ID2 PROTONS (11.24-12.62 MEV)
   Column 06: ID2 PROTONS (12.62-16.18 MEV)
   Column 07: ID2 PROTONS (16.18-20.00 MEV)
   Column 08: ID3 PROTONS (20.00-29.75 MEV)
   Column 09: ID4 PROTONS (29.75-40.10 MEV)
   Column 10: ID4 PROTONS (40.10-50.90 MEV)
   Column 11: ID4 PROTONS (50.90-62.55 MEV)
   Column 12: ID4 PROTONS (62.55-74.50 MEV)
   Column 13: ID4 PROTONS (74.50-94.78 MEV)

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