...
Units
- All fields shall use units as defined in WMO Tables
Output frequency
- The model output steps should be between 1 and 12 hour
Missing values
- Bitmaps shall be used to indicate missing values
...
- The fields have to be provided on a regular latitude‐longitude grid at the resolution that is best matching the native resolution of the direct model output.
- Grids are defined in GRIB2 using an accuracy of 1/1000000 (one millionth) of a degree.
- If several limited areas will be provided they should be merged into one larger area on a regular lat-lon grid, with a missing value indicator in the grid-points not covered.
GRIB2 encoding
Encoding software
...