.
KSEC1 element Contents GRIB octet Recommended GRIB_API key Coded GRIB_API keys Comments
37
ECMWF local GRIB use definition identifier.
24 = Satellite image
41 localDefinitionNumber localDefinitionNumber
38
Class
  = 1, Operations
            
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 Satellite identifier as defined in WMO Common code table C-5 50-51 ident
satelliteIdentifier

43 Instrument identifier as defined in WMO Common code table C-8 52-53 instrument
instrumentIdentifier

44 Channel number channel id tables 54-55 channel
channelNumber

45
Function code. Initially defined as:
0 = greyscale value,
1 = temperature in K and is 145 + pixel value,
2 = temperature and is pixel value.
56 functionCode
functionCode