GRIB2 - PRODUCT DEFINITION TEMPLATE 4.33

Individual Ensemble Forecast, control and perturbed, at
a horizontal level or in a horizontal layer at a point in
time for simulated (synthetic) satellite data

Revised 03/23/2016
Red text depicts changes made since 07/09/2013



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 centres)
14
Analysis or forecast generating process identified
15-16
Hours of observational data cut-off after reference time (see Note 2)
17
Minutes of observational data cut-off after reference time (see Note 2)
18
Indicator of unit of time range (see Code table 4.4)
19-20
Forecast time in units defined by octet 18
23
Number of contributing spectral bands (NB)


24 - Repeat the following 11 octets for each contributing band (nb = 1,NB)
Octet No. Contents
(24+11(nb-1))—(25+11(nb-1)) Satellite series of band nb (BUFR Code Table 0 02 020)
(26+11(nb-1))—(27+11(nb-1)) Satellite number of band nb (BUFR Code Table 0 01 007)
(28+11(nb-1))—(29+11(nb-1)) Instrument types of band nb (see Note 1 below)
(30 +11(nb-1)) Scale factor of central wave number of band nb
(31+11(nb-1))—(34+11(nb-1)) Scaled value of central wave number of band nb (units: m-1)
(24+11NB) Type of ensemble forecast (see Code table 4.6)
(24+11NB+1) Perturbation number
(24+11NB+2) Number of forecasts in ensemble


Note :

(1)  Instrument types code, a 16-bit value, stores the BUFR table 0 02 019 value,
a 10-bit value, in the lowest ten bits. The upper three bits (bits 1-3) contain the
polarization information, if known. The intervening three bits (4-6) are unused and
set to 0. Bits 1-3 will have one of the following values:
 8192*0 = 000 = unknown or missing
 8192*1 = 001 = unpolarized
 8192*2 = 010 = horizontal linear polarization
 8192*3 = 011 = vertical linear polarization
 8192*4 = 100 = right circular polarization
 8192*5 = 101 = left circular polarization
(2)  Hours greater than 65534 will be coded as 65534


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