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 valuesGrib_api keys
12Significance of Reference Time1Start of forecast 
13-14Year (four digits)2012year of start of forecast

 

dataDate=20120101 

dataTime=0

 

15Month01month of start of forecast
16Day01day of start of forecast
17Hour00hour of start of forecast
 section 4 template 4.60
18Indicator of unit of time range 1Hour 
19-22Forecast time48Forecast stepstepType=instant, step=48
38-39Year of Model Version2013when the forecast is run == when the version of the forecast used was operational

 

 

modelVersionDate=20130101

modelVersionTime=0

40Month of Model Version01
41Day of Model Version01
42Hour of Model Version00
43Minute of Model Version00
44Second of Model Version00

 

Examples of grib2 headers: