GRIB2 - PRODUCT DEFINITION TEMPLATE 4.121

Probability forecasts from large ensembles with spatiotemporal processing
based on focal (moving window) statistics at a horizontal level or in a horizontal layer at a point in time

Created 07/15/2024


Octet No. Contents
10
Parameter category (see Code table 4.1)
11
Parameter number (see Code table 4.2)
12
Type of generating process (seeCode table 4.3)
13
Background generating process identifier (defined by originating centre)
14
Forecast generating process identified (see Code ON388 Table A)
15-16
Hours after reference time data cut-off (see Note)
17
Minutes after reference time 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
Type of first fixed surface (see Code table 4.5)
24
Scale factor of first fixed surface
25-28
Scaled value of first fixed surface
29
Type of second fixed surfaced (see Code table 4.5)
30
Scale factor of second fixed surface
31-34
Scaled value of second fixed surfaces
35
Type of ensemble forecast (see Code table 4.6)
36-39
Number of forecast in ensemble
40
Forecast probability number
41
Total number of forecast probabilities
42
Probability type (see Code table 4.9)
43
Scale factor of lower limit
44-47
Scaled value of lower limit
48
Scale factor of upper limit
49-52
Scaled value of upper limit
53
Spatial vicinity type (see Code table 4.103)
54
Number of spatial vicinity values (NSV)

The next entry repeats nsv=1:NSV times
(55+(nsv-1)*4)-(58+(nsv-1)*4)
Spatial vicinity value
59+(nsv-1)*4
Spatial vicinity processing (see Code table 4.104)
(60+(nsv-1)*4)-(61+(nsv-1)*4)
Spatial vicinity processing argument 1 (e.g., if previous is quantile)
(62+(nsv-1)*4)-(63+(nsv-1)*4)
Spatial vicinity processing argument 2 (e.g., if previous is quantile)
64+(nsv-1)*4
Spatial vicinity missing data (see Code table 4.105)
(65+(nsv-1)*4)
Temporal vicinity processing (see Code table 4.104)
(66+(nsv-1)*4)
Temporal vicinity unit (see Code table 4.4)
(67+(nsv-1)*4)-(70+(nsv-1)*4)
Temporal vicinity towards past
(71+(nsv-1)*4)-(74+(nsv-1)*4)
Temporal vicinity towards future


Notes:

  Hours greater than 65534 will be coded as 65534


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