VM - GRIB - WMO version 23 Template

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Product definition template 4.54 - individual ensemble forecast, control and perturbed, at a horizontal level or in a horizontal layer at a point in time for partitioned parameters

Octet Number	Description	Note	Status
10	Parameter category	Code/Flag Table 4.1	Operational
11	Parameter number	Code/Flag Table 4.2	Operational
12	Partition Table Number (PTN)	(see Notes 1 and 3)	Operational
13	Number of Partitions (NP)	(see Note 1)	Operational
14-(14+2NP-1)	Partition set (list all partition numbers in the partition)	(see Code table 4.PTN and Note 1)	Operational
(14+2NP)-(15+2NP)	Partition number (PN)	(see Code table 4.PTN and Note 3)	Operational
(16+2NP)	Type of generating process	Code/Flag Table 4.3	Operational
(17+2NP)	Background generating process identifier (defined by originating centre)		Operational
(18+2NP)	Analysis or forecast generating process identifier (defined by originating centre)		Operational
(19+2NP)-(20+2NP)	Hours of observational data cut-off after reference time	(see Note 1)	Operational
(21+2NP)	Minutes of observational data cut-off after reference time		Operational
(22+2NP)	Indicator of unit of time range	Code/Flag Table 4.4	Operational
(23+2NP)-(26+2NP)	Forecast time in units defined by octet (22+2NP)		Operational
(27+2NP)	Type of first fixed surface	Code/Flag Table 4.5	Operational
(28+2NP)	Scale factor of first fixed surface		Operational
(29+2NP)-(32+2NP)	Scaled value of first fixed surface		Operational
(33+2NP)	Type of second fixed surface	Code/Flag Table 4.5	Operational
(34+2NP)	Scale factor of second fixed surface		Operational
(35+2NP)-(38+2NP)	Scaled value of second fixed surface		Operational
(39+2NP)	Type of ensemble forecast	Code/Flag Table 4.6	Operational
(40+2NP)	Perturbation number		Operational
(41+2NP)	Number of forecasts in ensemble		Operational

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