GRIB2 - TEMPLATE 4.0
Product definition template ―Analysis or forecast at a horizontal level or in a horizontal layer at a point in time
Revised 09/21/2007

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 | Analysis or forecast generating process identified (see Code ON388 Table A)
15-16 | Hours of observational data cutoff after reference time (see Note)
17 | Minutes of observational data cutoff after reference time (see Note)
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

Notes: Hours greater than 65534 will be coded as 65534

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