This example represents a 6-hour maximum of a field valid on 20120103 00Z produced by a forecast started on 20120101 00Z
...
. In this example, the maximum is the 6-hourly maximum in the time interval: steps 42 to 48.
- 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 (Maximum over the last 6 hours ) | ||||||||
---|---|---|---|---|---|---|---|---|
Start of forecast ( section 1 ) | ||||||||
Octetsreforecast | Octets real time | Fixed values to be used by all the partners | values | Meaning of values | Grib_api keysExample | |||
12 | 12 | Significance of Reference Time | =1 | Start of forecast | = 1 | 13-14|||
13-14 | Year (four digits) | 2012 | year of start of forecast |
dataDate= | 201220120101 | 15dataTime=0 | ||
15 | Month | 01 | month of start of forecast | = 01 | ||||
16 | 16 | Day | 01 | day of start of forecast | = 01 | |||
17 | 17 | Hour | 00 | hour of start of forecast | = 00 | |||
Maximum ( section 4 e.g. Template 4.11) | ||||||||
18 | 18 | Indicator of unit of time range | = 11 | Hour | = 1 | |||
19-22 | 19-22 | Forecast time | =42 | Step at the beginning of the 6-hourly interval | startStep=42 | |||
45-46 | 38-39 | year of end of overall time interval | 2012 |
End of accumulated maximum period |
endStep= | 201248 | ||
47 | 40 | month of end of overall time interval | = | 01 | 48||||
41 | day of end of overall time interval | = | 03 | |||||
49 | 42 | hour of end of overall time interval | = | 00 | 52||||
45 | number of time ranges | 1 | Only one time statistics applied (maximum) | = 4 6 hourly fields used in average | ||||
53-56 | 46-49 | total number of data values missing in statistical process | = 00 | = 0 | ||||
57 | 50 | Statistical process used to calculate the processed field from the field at each time increment during the time range | = 22 | Maximum | stepType= 2max | |||
58 | 51 | 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 | = 2 | |||
59 | 52 | Indicator of unit of time for time range over which statistical processing is done | = 11 | Hour | indicatorOfUnitForTimeRange=1 | |||
60-63 | 53-56 | Length of the time range over which statistical processing is done, in units defined by the previous octet | = 6 | 6-hourly maximum | lengthOfTimeRange=6 | 64|||
57 | Indicator of unit of time for the increment between the successive fields used | = 2551 | MissingHour | indicatorOfUnitForTimeIncrement= 2551 | ||||
65-68 | 58-61 | Time increment between successive fields, in units defined by the previous octet | 0 | Maximum computed continuously in the 6 hourly interval | timeIncrement=0 | Time frequency used to compute the daily mean
Examples of grib2 headers: