GRIB2 - PRODUCT DEFINITION TEMPLATE 4.143

Random fields used in an ensemble forecast, at a horizontal level or in a horizontal layer at a point in time

Created 09/29/2025


Octet No. Contents
10
Parameter category (see Code table 4.1)
11
Parameter number (see Code table 4.2)
12
Type of generating process (see Code table 4.3)
13
Background generating process identifier (defined by originating centre)
14
Forecast generating process identifier (see ON388 Table A)
15-16
Hours after reference time of data cut-off (see Note 1)
17
Minutes after reference time of data cut-off
18
Indicator of unit of time range (see Code table 4.4)
19-22
Forecast time in units defined by octet 18
23-24
Random field number
25-26
Total number of random fields
27-28
Spatio-temporal scale number
29-30
Total number of spatio-temporal scales
31-34
Scaled value of spatial scale
35
Scale factor of spatial scale
36-39
Scaled value of temporal scale
40
Scale factor of temporal scale
41
Type of first fixed surface (see Code table 4.5)
42
Scale factor of first fixed surface
43-46
Scaled value of first fixed surface
47
Type of second fixed surface (see Code table 4.5)
48
Scale factor of second fixed surface
49-52
Scaled value of second fixed surface
53
Type of ensemble forecast
54-57
Perturbation number
58-61
Number of forecasts in ensemble


Notes:

(1)  Hours greater than 65534 will be coded as 65534



Back