KSEC1 element | Contents | GRIB octet | Recommended GRIB_API keys | Coded GRIB_API keys | Comments
--- | --- | --- | --- | --- | ---
37 |
    ECMWF local GRIB use definition identifier
    2 = Cluster means and standard deviations.
| 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 | Cluster number. | 50 | number | clusterNumber |
43 | Total number of clusters. | 51 | totalNumberOfClusters | totalNumberOfClusters |
- | Spare (set to zero) | 52 |  |  |
44 |
    Clustering method:
     1 = Maximum linkage method
     2 = Mixed method
     3 = Small linkage method
| 53 | clusteringMethod | clusteringMethod |
45 | Start time step considered when clustering. (Same units of time as forecast timesteps.) | 54-55 | startTimeStep | startTimeStep |
46 | End time step considered when clustering. (Same units of time as forecast timesteps.) | 56-57 | endTimeStep | endTimeStep |
47 | Northern latitude of the domain of clustering. | 58-60 | northernLatitudeOfDomain | northernLatitudeOfDomain | Key "domain" can be used. It contains the 4 coordinates.
48 | Western longitude of the domain of clustering. | 61-63 | westernLongitudeOfDomain | westernLongitudeOfDomain |
49 | Southern latitude of the domain of clustering. | 64-66 | southernLatitudeOfDomain | southernLatitudeOfDomain |
50 | Eastern longitude of the domain of clustering. | 67-69 | easternLongitudeOfDomain | easternLongitudeOfDomain |
51 | Number of cluster to which the operational forecast belongs. | 70 | operationalForecastCluster | operationalForecastCluster |
52 | Number of cluster to which the control forecast belongs. | 71 | controlForecastCluster | controlForecastCluster |
53 | Number of forecasts belonging to the cluster, including the control forecast (N). | 72 | numberOfForecastsInCluster | numberOfForecastsInCluster |
54-53+N | List of N ensemble forecast numbers. | 73 -72+N | ensembleForecastNumbers | ensembleForecastNumbers | list of numberOfForecastsInCluster numbers
- | Spare to ensure fixed length for section. | 73+N-328 |  |  |