1# Code table 4.2 - Parameter number by product discipline and parameter category
20 0 Seconds prior to initial reference time (defined in Section 1) (s)
31 1 Geographical latitude (deg N)
42 2 Geographical longitude (deg E)
53 3 Days since last observation (d)
6# 4-191 Reserved
7# 192-254 Reserved for local use
8255 255 Missing
9