In the standard name table what do the E numbers in the GRIB column denote, i.e. E151 (air_pressure_at_sea_level), E130 (air_temperature). I understand what the plain numerical values represent, i.e. 1 equals pressure, 2 equals pressure reduced to MSL etc. Having decoded some GRIB 1 data files (Binary Viewer) I recognise the use of the plain numerals as per GRIB tables, but haven't seen any E values and can't find anything to explain what they are. Regards, Glenn
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