GRIB2 - GRID TEMPLATE 4.4
Product definition template ― 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 08/23/2005

Octet | 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 (defined by originating centre)
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 | Nc ― 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 Nc ensemble forecast numbers ( Nc is given in octet 54)

Notes: Hours greater than 65534 will be coded as 65534

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