This example represents a daily average valid on 2 January 2012 of a field produced by a reforecast started on 20120101 00Z produced with the model version which is operational at 20130101 00Z. In this example, where the field is produced 6hourly, the daily average valid on 20120102 is the average of steps 24, 30, 36 and 42.
 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 ( daily average )  

Start of reforecast ( section 1 )  
Octets  values  Meaning of values  grib_api keys  
12  Significance of Reference Time  1  Start of forecast  
1314  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  
Daily average ( section 4 template 4.61 )  
18  Indicator of unit of time range  1  Hour  
1922  Forecast time  24  Start of forecast + forecast time = start of average period  startStep=24 
3839  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  
4546  year of end of overall time interval  2012 
End of average period 
endStep=48 
47  month of end of overall time interval  01  
48  day of end of overall time interval  03  
49  hour of end of overall time interval  00  
52  number of time ranges  1  Only one time statistics applied (average)  
5356  total number of data values missing in statistical process  0  
57  Statistical process used to calculate the processed field from the field at each time increment during the time range  0  Average  stepType=avg 
58  Type of time increment between successive fields used in the statistical processing  2  Successive times processed have same start time of forecast, forecast time is incremented  
59  Indicator of unit of time for time range over which statistical processing is done  11  6hourly  indicatorOfUnitForTimeRange=11 
6063  Length of the time range over which statistical processing is done, in units defined by the previous octet  4  Daily average  lengthOfTimeRange=4 
64  Indicator of unit of time for the increment between the successive fields used  11  6hourly  indicatorOfUnitForTimeIncrement=11 
6568  Time increment between successive fields, in units defined by the previous octet  1  Time frequency used to compute the daily mean In the example, 1 means that 6hourly outputs have been used to compute the average  timeIncrement=1 
Examples of grib2 headers: