GRIB2 - PRODUCT DEFINITION TEMPLATE 4.58

Individual Ensemble Forecast, Control and Perturbed, at a
horizontal level or in a horizontal layer at a point in time interval for
Atmospheric Chemical Constituents based on a distribution function

Created 07/10/2017


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.



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