GRIB2 - PRODUCT DEFINITION TEMPLATE 4.77

Individual ensemble forecast, control and perturbed, at a horizontal level or in
a horizontal layer at a point in time for atmospheric chemical constituents with source or sink

Created 03/01/2023


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
Source or sink (see Code table 4.238)
15
Type of generating process (see Code Code Table 4.3)
16
Background generating process identifier (defined by originating centre)
17
Forecast generating process identifier (defined by originating centre)
18-19
Hours after reference time of data cut-off (see Note)
20
Minutes after reference time of data cut-off
21
Indicator of unit of time range (see Code table 4.4)
22-25
Forecast time in units defined by octet 21
26
Type of first fixed surface (see Code table 4.5)
27
Scale factor of first fixed surface
28-31
Scaled value of first fixed surface
32
Type of second fixed surfaced (see Code table 4.5)
33
Scale factor of second fixed surface
34-37
Scaled value of second fixed surfaces
38
Type of ensemble forecast (see Code table 4.6)
39
Purturbation number
40
Number of forecasts in ensemble


Notes:

  Hours greater than 65534 will be coded as 65534


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