KSEC1 element | Contents | GRIB octet | Recommended GRIB_API keys | Coded GRIB_API keys | Comments
--- | --- | --- | --- | --- | ---
37 |
    ECMWF local GRIB use definition identifier.
    15 = Seasonal forecast data
| 41 | localDefinitionNumber | localDefinitionNumber |
38 | Class | 42 | class | marsClass |
39 | Type | 43 | type | marsType |
40 | Stream | 44-45 | stream | marsStream |
41 |
    Version number or experiment identifier.
    (4 ASCII characters, right justified)
| 46-49 | expver | experimentVersionNumber |
42 | Ensemble member number | 50-51 | number | perturbationNumber |
43 |
    Total number of ensembles.
    Was set to zero in earlier versions of definition 15
| 56-57 (note change in sequence of octet order) |  |  |
44 |
    System number
      The "scientific version" number.
      0 = RD experiment
      1 - 65534 = operational version number
      65535 = missing
| 52-53 | system | systemNumber |
45 |
    Method number
      Distinguishes scientifically different forecast ensembles
      (eg different calibration/bias correction)
      0 = control integration (ie without data assimilation)
      1 - 65534 = operational version number
| 54-55 | method | methodNumber |
- | Spare (set to zero) | 58-60 |  |  |