| Octet No. | Contents |
|---|---|
| 10 |
Parameter category (see Code Table 4.1) |
| 11 |
Parameter number (see Code Table 4.2) |
| 12-13 |
Atmospheric Chemical Constituent Type (see
Code table 4.230) |
| 14-15 | Number of mode (N) of distribution (See Note 1) |
| 16-17 | Mode number (l) |
| 18-19 | Type of distribution function (see Code Table 4.240) |
| 20 | Number of following function paramters (Np), defined by type given in octet 18-19 (Type of distribution function) |
| 21 ― Repeat the following 5 octets for the number of function parameters (n=1, Np), if Np>0 | |
| 21+5(n-1) | List of scale factor of fixed distribution function parameter (p1 - pNp), defined by type of distribution in octet 18-19 |
| (22+5(n-1)) - (25+5(n-1)) | List of scale value of fixed distribution function parameter (p1 - pNp), defined by type of distribution in octet 18-19 |
| 21+5Np | Type of generting process (see Code Table 4.3) |
| 22+5Np | Background generting process identifier (defined by originating centre) |
| 23+5Np | Analysis or forecast generating process identifier (defined by originating centre) |
| (24+5Np) - (25+5Np) | Hours of observational data cut-off after reference time (See Note 2) |
| 26+5Np | Minutes of observational data cut-off after reference time |
| 27+5Np | Indicator of unit of time range (see Code Table 4.4) |
| (28+5Np) - (31+5Np) | Forecast time in units defined by previous octet |
| 32+5Np | Type of first fixed surface (see Code Table 4.5) |
| 33+5Np | Scale factor of first fixed surface |
| (34+5Np) - (37+5Np) | Scale value of first fixed surface |
| 38+5Np | Type of first second surface (see Code Table 4.5) |
| 39+5Np | Scale factor of second fixed surface |
| (40+5Np) - (43+5Np) | Scale value of second fixed surface |
| 44+5Np | Type of Ensemble Forecast (see Code Table 4.6) |
| 45+5Np | Perturbation Number |
| 46+5Np | Number of Forecasts in Ensemble |
| Notes: 1. If Number of mode (N) > 1, then between X N fields with mode number I=1,...,N define the distribution function. X is number of variable parameters in the distribution function. 2. Hours greater than 65534 will be coded as 65534 3. For more information, see Part B, GRIB Attachment III. |