KSEC1 element	Contents	GRIB octet	Recommended GRIB_API keys	Coded GRIB_API keys	Comments
37	ECMWF local GRIB use definition identifier. 3 = Satellite image 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	Band: 0 = first infrared band 1 = second infrared band 10 = first visible band 20 = water vapour	50	band	band
43	Function code (interpretation of pixel value): 0 = value is pixel value 1 = value is temperature in degrees K, and is 145 + pixel value 2 = value is temperature in degrees K, and is the pixel value 255 = translation table follows	51	functionCode	functionCode
-	Spare (set to zero)	52