# Code table 4.2 - Parameter number by product discipline and parameter category
0 0 Pressure (Pa)
1 1 Pressure reduced to MSL (Pa)
2 2 Pressure tendency (Pa/s)
3 3 ICAO Standard Atmosphere Reference Height (m)
4 4 Geopotential (m2 s-2)
5 5 Geopotential height (gpm)
6 6 Geometric height (m)
7 7 Standard deviation of height (m)
8 8 Pressure anomaly (Pa)
9 9 Geopotential height anomaly (gpm)
10 10 Density (kg m-3)
11 11 Altimeter setting (Pa)
12 12 Thickness (m)
13 13 Pressure altitude (m)
14 14 Density altitude (m)
15 15 5-wave geopotential height (gpm)
16 16 Zonal flux of gravity wave stress (N m-2)
17 17 Meridional flux of gravity wave stress (N m-2)
18 18 Planetary boundary layer height (m)
19 19 5-wave geopotential height anomaly (gpm)
20 20 Standard deviation of sub-grid scale orography (m)
21 21 Angle of sub-gridscale orography (rad)
22 22 Slope of sub-gridscale orography (Numeric)
23 23 Gravity wave dissipation (W m-2)
24 24 Anisotropy of sub-gridscale orography (Numeric)
25 25 Natural logarithm of pressure in Pa (Numeric)
26 26 Exner pressure (Numeric)
# 27-191 Reserved 
# 192-254 Reserved for local use 
255 255 Missing 
