KSEC1 element	Contents	GRIB octet	Recommended GRIB_API key	Coded GRIB_API keys	Comments
37	ECMWF local GRIB use definition identifier. 192 = Multiple ECMWF local definitions	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	Zero, for compatibility with Mars labelling	50
43	Zero, for compatibility with Mars labelling	51
44	Number of ECMWF local definitions	52	numberOfLocalDefinitions	numberOfLocalDefinitions
45	First ECMWF local definition length (N1). This is the number of KSEC1 elements (not the number of octets).		subLocalDefinitionLength	subLocalDefinitionLength
46	List of first ECMWF local definition values. The first value is the local definition number.		subLocalDefinitionNumber	subLocalDefinitionNumber
45+N1	Second ECMWF local definition length (N2).
46+N1	List of second ECMWF local definition values.
45+N1+N2	Third ECMWF local definition length (N3).
46+N1+N2	List of third ECMWF local definition values.
...	...

Each list of ECMWF local definition values starts:

  ECMWF local GRIB use definition identifier
  Class
  Type
  Stream
  Version number or experiment identifier
  etc.