...
Control and perturbed forecasts are identified in section 1 and 4. The following tables explains how to code them in GRIB2:
| Section 1 | ||||
|---|---|---|---|---|
| Octets | Example perturbed (pf) | Example controlcontrol (cf) | forecast * (fc) | |
| 21 | type of processed data | 4 | 3 | 2 |
(*) high-resolution forecast interpolated to ensemble resolution (new request from 2020 for TIGGE, phase III)
| Ensemble (section 4, template 4.61) | |||
|---|---|---|---|
| Octets | Example perturbed | Example control | |
| 8-9 | product definition template number | 1/11* | 1/11* |
| 35 | type of ensemble forecast | 255 (missing) | 255 (missing) |
| 36 | perturbation number | 7 | 0 |
| 37 | number of forecasts in ensemble | 51 | 51 |
...