GRIB2 - PRODUCT DEFINITION TEMPLATE 4.4

Derived forecasts based on a cluster of ensemble members over a
circular area at a horizontal level or in a horizontal layer at a point in time

Created 09/21/2007


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 identified (see Code ON388 Table A)
15-16
Hours after reference time data cutoff (see Note)
17
Minutes after reference time data cutoff
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
Derived forecast (see Code Table 4.7)
36
Number of forecasts in the ensemble (N)
37
 Cluster identifier
38
Number of cluster to which the high resolution control belongs
39
Number of cluster to which the low resolution control belongs
40
Total number of clusters
41
Clustering method (see Code Table 4.8)
42-45
Latitude of central point in cluster domain
46-49
Longitude of central point in cluster domain
50-53
Radius of cluster domain
54
N― number of forecasts in the cluster
55
Scale factor of standard deviation in the cluster
56-59
Scaled value of standard deviation in the cluster
60
Scale factor of distance of the cluster from ensemble mean
61-64
Scaled value of distance of the cluster from ensemble mean
65 ―(64+Nc)
List of  Nensemble forecast numbers ( Nc is given in octet 54)


Notes:

  Hours greater than 65534 will be coded as 65534


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