Table4.2.3.6 https://www.nco.ncep.noaa.gov/pmb/docs/grib2/grib2_doc/grib2_table4-2-3-6.shtml GSOLIRR Global Solar Irradiance (See Note 1) W m-2 GSOLEXP Global Solar Exposure (See Note 2) J m-2 DIRSOLIR Direct Solar Irradiance (See Note 3) W m-2 DIRSOLEX Direct Solar Exposure (See Note 4) J m-2 DIFSOLIR Diffuse Solar Irradiance (See Note 5) W m-2 DIFSOLEX Diffuse Solar Exposure (See Note 6) J m-2