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 |  |  |