| Octet Number |
Description |
Note |
Status |
| 10 |
Parameter category |
Code/Flag Table 4.1 |
Operational |
| 11 |
Parameter number |
Code/Flag Table 4.2 |
Operational |
| 12-13 |
Atmospheric chemical constituent type |
Code/Flag Table 4.230 |
Operational |
| 14 |
Type of generating process |
Code/Flag Table 4.3 |
Operational |
| 15 |
Background generating process identifier (defined by originating centre) |
None |
Operational |
| 16 |
Analysis or forecast generating process identifier (defined by originating centre) |
None |
Operational |
| 17-18 |
Hours of observational data cut-off after reference time |
(see Note) |
Operational |
| 19 |
Minutes of observational data cut-off after reference time |
None |
Operational |
| 20 |
Indicator of unit of time range |
Code/Flag Table 4.4 |
Operational |
| 21-24 |
Forecast time in units defined by octet 20 |
None |
Operational |
| 25 |
Type of first fixed surface |
Code/Flag Table 4.5 |
Operational |
| 26 |
Scale factor of first fixed surface |
None |
Operational |
| 27-30 |
Scaled value of first fixed surface |
None |
Operational |
| 31 |
Type of second fixed surface |
Code/Flag Table 4.5 |
Operational |
| 32 |
Scale factor of second fixed surface |
None |
Operational |
| 33-36 |
Scaled value of second fixed surface |
None |
Operational |