.

KSEC1 element | Contents | GRIB octet | Recommended GRIB_API key | Coded GRIB_API keys | Comments
--- | --- | --- | --- | --- | ---
37 |
    ECMWF local GRIB use definition identifier.
    23 = Coupled atmospheric, wave and ocean models (with hindcast support)
| 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.
    Control forecast is number 0, perturbed forecasts are 1-nn.
| 50-51 | number | perturbationNumber |
43 | Number of forecasts in ensemble | 81-82 |  |  |
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 |
46 | Verifying month (in format YYYYMM), or period used for mean (dddDDD for period from time ddd to time DDD) | 56-59 | verifyingMonth | verifyingMonth |
47 | Averaging period (eg 6-hour, 24-hour) | 60 | averagingPeriod | averagingPeriod |
48 | Forecast month | 61-62 | forecastMonth | forecastMonth |
49 | Reference date (YYYYMMDD) | 63-66 | refdate | referenceDate |
50 | Climate date - from (YYYYMMDD) | 67-70 | climateDateFrom | climateDateFrom |
51 | Climate date - to (YYYYMMDD) | 71-74 | climateDateTo | climateDateTo |
52-59 | Probability information | 75-84 |  |  |
52 | Threshold units decimal scale factor. + or - power of 10 (or zero). Most significant bit = 1 for negative values. | 75 | unitsDecimalScaleFactor | unitsDecimalScaleFactor |
53 | Threshold indicator: 1 = Only lower threshold is present. 2 = Only upper threshold is present. 3 = Both upper and lower thresholds are present. | 76 | thresholdIndicator | thresholdIndicator |
54 | Lower threshold value. | 77-78 | lowerThresholdValue | lowerThresholdValue |
55 | Upper threshold value. | 79-80 | upperThresholdValue | upperThresholdValue |
56-59 | Spare (set to zero) | 83-84 |  |  |