| Octet No. | Contents |
|---|---|
| 10 |
Parameter category (see Code table 4.1) |
| 11 |
Parameter number (see Code table 4.2) |
| 12-13 |
Input process identifier (see Note 1) |
| 14-15 |
Input originating center (see Note 2 and Common Code table C-11) |
| 16 |
Type of post-processing (see Note 3) |
| 17 |
Type of generating process (see Code table 4.3) |
| 18 |
Background generating process identifier (defined by originating center) |
| 19 |
Analysis or forecast generating process identifier (defined by originating center) |
| 20 |
Type of first fixed surfaced (see Code table 4.5) |
| 21 |
Scale factor of first fixed surface |
| 22-25 |
Scaled value of first fixed surface |
| 26 |
Type of second fixed surfaced (see Code table 4.5) |
| 27 |
Scale factor of second fixed surface |
| 28-31 |
Scaled value of second fixed surface |
| 32 |
Method used to derive the data field values at the local time specified in section 1
(see Code Table 4.248) |
| 33 |
n - number of forecasts used to create the composite data field at the local time specified in section 1 (n >= 1) |
| Octets 34-51 Specification of the analysis or forecast used in the processing (n=1) |
|
| 34-35 |
Year of the forecast used in the processing |
| 36 |
Month of the forecast used in the processing |
| 37 |
Day of the forecast used in the processing |
| 38 |
Hour of the forecast used in the processing |
| 39 |
Minute of the forecast used in the processing |
| 40 |
Second of the forecast used in the processing |
| 41 |
Indicator of units of forecast time (see Note 5 and Code Table 4.4) |
| 42-45 |
Forecast Time (see Notes 4 and 5) |
| 46 |
Number of time increments of the forecast used in the processing |
| 47 |
Indicator of units of time for the time increments (see Code Table 4.4) |
| 48-51 |
Time increments between successive forecast times |
| Octets 52-nn are included only if n > 1 where nn = 33 + 18 x n |
|
| 52-nn |
(n-1) repetitions of sequence of octets 34-51 describing the next analyses or forecasts used in the processing |
| Notes: (1) The input process identifier shall have the value of the ""analysis or forecast process identifier"" of the original GRIB message used as input of the post-processing. (2) The input originating center shall have the value of the ""originating center"" of the original GRIB message used as input of the post-processing. (3) This identifies which post-processing technique was used. This is defined by the originating center. (4) The reference time in octets 34-40 and the forecast time together define the beginning of the overall time interval. (5) Set code to missing if analysis. |