This example describes an instantaneous field  valid on 20120103 00Z from a forecast starting on 20120101 00Z (time step=48 hours) .

  • 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 forecast ( section 1 )

Octets

 

 values

Meaning of valuesGrib_api values
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 e.g. template 4.1
18Indicator of unit of time range 1Hour 
19-22Forecast time48Forecast stepstepType=instant, step=48

 

Examples of grib2 headers: