GRIB2 - PRODUCT DEFINITION TEMPLATE 4.149

Verification scores for individual ensemble forecast, control and perturbed,
at a horizontal level or in a horizontal layer in a continuous or non-continuous time interval

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 process
14
Generating process identifier (see Code ON388 Table A)
15-16
Hours after data cut-off
17
Minutes after data cut-off
18
Indicator of unit of time range (see Code table 4.4)
19-22
Forecast time
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 surface (see Code table 4.5)
30
Scale factor of second fixed surface
31-34
Scaled value of second fixed surface
35
Type of ensemble forecast (see Code table 4.6)
36-39
Perturbation number
40-43
Number of forecasts in ensemble
44-45
Year of end of overall time interval
46
Month of end of overall time interval
47
Day of end of overall time interval
48
Hour of end of overall time interval
49
Minute of end of overall time interval
50
Second of end of overall time interval
51
Number of time range (NR)
52-55
Number of missing in statistical process

The next six entries are repeated NR times nr=1:NR
56+(nr-1)*12
Type of statistical processing (see Code table 4.10)
57+(nr-1)*12
Type of time increment (see Code table 4.11)
58+(nr-1)*12
Indicator of unit for time range (see Code table 4.4)
(59+(nr-1)*12) - (62+(nr-1)*12)
Length of time range
63+(nr-1)*12
Indicator of unit for time increment (see Code table 4.4)
(64+(nr-1)*12) - (67+(nr-1)*12)
Time increment

End of sequence repeated NR times
(68+(NR-1)*12) - (69+(NR-1)*12)
Verification score (see Code table 4.120)
70+(NR-1)*12
Type of reference dataset for verification (see Code table 4.121)
71+(NR-1)*12
Type of statistical processing over vertical for verification (see Code table 4.10)
72+(NR-1)*12
Type of threshold operator for verification score (see Code table 4.91)
73+(NR-1)*12
Type of additional arguments for verification score (see Code table 4.122)
74+(NR-1)*12
Number of additional arguments for verification (NA)

The next two entries are repeated NA times na=0:NA - can be 0 times if no parameters are necessary (na=0)
75+(NR-1)*12+(na-1)*5
Scale factor of additional argument for verification
(76+(NR-1)*12+(na-1)*5) - (79+(NR-1)*12+(na-1)*5)
Scaled value of additional argument for verification

End of sequence repeated NA times
(75+(NR-1)*12+NA*5) - (76+(NR-1)*12+NA*5)
Year of start of verification period
77+(NR-1)*12+NA*5
Month of start of verification period
78+(NR-1)*12+NA*5
Day of start of verification period
79+(NR-1)*12+NA*5
Hour of start of verification period
80+(NR-1)*12+NA*5
Minute of start of verification period
81+(NR-1)*12+NA*5
Second of start of verification period
82+(NR-1)*12+NA*5
Number of verification period time ranges (NV)

The next five entries are repeated NV times nv=1:NV
83+(NR-1)*12+NA*5+(nv-1)*11
Type of statistical processing for time range for verification period (see Code table 4.10)
84+(NR-1)*12+NA*5+(nv-1)*11
Indicator of unit for time range for verification period (see Code table 4.4)
(85+(NR-1)*12+NA*5+(nv-1)*11) - (88+(NR-1)*12+NA*5+(nv-1)*11)
Length of time range for verification period
89+(NR-1)*12+NA*5+(nv-1)*11
Indicator of unit for time increment for verification period (see Code table 4.4)
(90+(NR-1)*12+NA*5+(nv-1)*11) - (93+(NR-1)*12+NA*5+(nv-1)*11)
Time increment for verification period

End of sequence repeated NV times
(94+(NR-1)*12+NA*5+NV*11) - (95+(NR-1)*12+NA*5+NV*11)
Number of forecasts in verification


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