1# Code table 4.2 - Parameter number by product discipline and parameter category 20 0 Net long-wave radiation flux (surface) (W m-2) 31 1 Net long-wave radiation flux (top of atmosphere) (W m-2) 42 2 Long-wave radiation flux (W m-2) 53 3 Downward long-wave radiation flux (W m-2) 64 4 Upward long-wave radiation flux (W m-2) 75 5 Net long-wave radiation flux (W m-2) 86 6 Net long-wave radiation flux, clear sky (W m-2) 97 7 Brightness temperature (K) 108 8 Downward long-wave radiation flux, clear sky (W m-2) 11# 9-191 Reserved 12# 192-254 Reserved for local use 13255 255 Missing 14