KSEC1 element	Contents	GRIB octet	Recommended GRIB_API keys	Coded GRIB_API keys	Comments
37	ECMWF local GRIB use definition identifier. 8 = ECMWF re-analysis data	41	localDefinitionNumber	localDefinitionNumber
38	Class	42	class	marsClass
39	Type	43	type	marsType
40	Stream	44-45	stream	marsStream
41	Version number or experiment identifier. (4 ASCII characters, right justified)	46-49	expver	experimentVersionNumber
42	Interval between reference times (in time units)	50	intervalBetweenTimes	intervalBetweenTimes
43-54	Unsigned integers in range (0-255)	51-62	unsignedIntegers	unsignedIntegers