This example describes an instantaneous re-forecast field valid on 20120103 00Z from a forecast starting on 20120101 00Z (time step=48 hours) and produced with the model version which is operational at 20130101 00Z .
- In bold, the values are fixed. They are meant to be used by all partners
- In green, these are the values for the example.
| Time ( instantaneous ) | ||||
|---|---|---|---|---|
| Start of re-forecast ( section 1 ) | ||||
Octets | values | Meaning of values | Grib_api keys | |
| 12 | Significance of Reference Time | 1 | Start of forecast | |
| 13-14 | Year (four digits) | 2012 | year of start of forecast |
dataDate=20120101 dataTime=0
|
| 15 | Month | 01 | month of start of forecast | |
| 16 | Day | 01 | day of start of forecast | |
| 17 | Hour | 00 | hour of start of forecast | |
| section 4 template 4.60 | ||||
| 18 | Indicator of unit of time range | 1 | Hour | |
| 19-22 | Forecast time | 48 | Forecast step | stepType=instant, step=48 |
| 38-39 | Year of Model Version | 2013 | when the forecast is run == when the version of the forecast used was operational |
modelVersionDate=20130101 modelVersionTime=0 |
| 40 | Month of Model Version | 01 | ||
| 41 | Day of Model Version | 01 | ||
| 42 | Hour of Model Version | 00 | ||
| 43 | Minute of Model Version | 00 | ||
| 44 | Second of Model Version | 00 | ||
Examples of grib2 headers: