| Octet No. | Contents |
|---|---|
| 10 |
Parameter category (see Code table 4.1) |
| 11 |
Parameter number (see Code table 4.2) |
| 12 |
Type of generating process (see Code table 4.3) |
| 13 |
Background generating process identifier (defined by originating centre) |
| 14 |
Analysis or forecast generating process identifier (see ON388 Table A) |
| 15-16 |
Hours of observational data cut-off after reference time (see Note 1) |
| 17 |
Minutes of observational data cut-off after reference time |
| 18 |
Indicator of unit of time range (see Code table 4.4) |
| 19-22 |
Forecast time in units defined by octet 20 |
| 23 |
Type of first fixed surface (see Code table 4.5) |
| 24 |
Scale factor of first fixed surface |
| 25-28 |
Scaled value of first fixed surface |
| 29 |
Type of second fixed surface (see Code table 4.5) |
| 30 |
Scale factor of second fixed surface |
| 31-34 |
Scaled value of second fixed surface |
| 35 |
Type of ensemble forecast (see Code table 4.6) |
| 36-39 |
Perturbation number |
| 40-43 |
Number of forecasts in ensemble |
| 44-45 |
Year of model version date (see Note 2) |
| 46 |
Month of model version date |
| 47 |
Day of model version date |
| 48 |
Hour of model version date |
| 49 |
Minute of model version date |
| 50 |
Second of model version date |
| Notes: (1) Hours greater than 65534 will be coded as 65534 (2) This is the date when the reforecast is produced with a particular version of the model. |