This example represents a daily average valid on 2 January 2012 of a field produced by a real-time forecast started on 20120101 00Z. In this example, where the field is produced 6-hourly, 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 forecast ( section 1 ) | ||||
Octets reforecast | Octets real time | values | meaning of values | |
| 12 | 12 | Significance of Reference Time | 1 | Start of forecast |
| 13-14 | 13-14 | Year (four digits) | 2012 | year of start of forecast |
| 15 | 15 | Month | 01 | month of start of forecast |
| 16 | 16 | Day | 01 | day of start of forecast |
| 17 | 17 | Hour | 00 | hour of start of forecast |
| Daily average ( section 4 ) | ||||
| 18 | 18 | Indicator of unit of time range | 1 | Hour |
| 19-22 | 19-22 | Forecast time | 24 | Start of forecast + forecast time = start of average period |
| 45-46 | 38-39 | year of end of overall time interval | 2012 |
End of average period |
| 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 (average) |
| 53-56 | 46-49 | total number of data values missing in statistical process | 0 | |
| 57 | 50 | Statistical process used to calculate the processed field from the field at each time increment during the time range | 0 | Average |
| 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 |
| 59 | 52 | Indicator of unit of time for time range over which statistical processing is done | 11 | 6-hourly |
| 60-63 | 53-56 | Length of the time range over which statistical processing is done, in units defined by the previous octet | 4 | Daily average |
| 64 | 57 | Indicator of unit of time for the increment between the successive fields used | 11 | 6-hourly |
| 65-68 | 58-61 | 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 6-hourly outputs have been used to compute the average |