VM - GRIB - WMO version 25 Template

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Data representation template 5.2 - Grid point data - complex packing

Octet Number	Description	Note	Status
12-21	Same as data representation template 5.0		Operational
22	Group splitting method used	Code/Flag Table 5.4	Operational
23	Missing value management used	Code/Flag Table 5.5	Operational
24-27	Primary missing value substitute		Operational
28-31	Secondary missing value substitute		Operational
32-35	NG - number of groups of data values into which field is split		Operational
36	Reference for group widths	(see Note 12)	Operational
37	Number of bits used for the group widths (after the reference value in octet 36 has been removed)		Operational
38-41	Reference for group lengths	(see Note 13)	Operational
42	Length increment for the group lengths	(see Note 14)	Operational
43-46	True length of last group		Operational
47	Number of bits used for the scaled group lengths (after subtraction of the reference value given in octets 38-41 and division by the length increment given in octet 42)		Operational

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