Local definition 3: Satellite image data

Local definitions

Octets Key Type Contents
41 localDefinitionNumber unsigned ECMWF local GRIB use definition identifier. 3 = Satellite image data.
42 class codetable Class
43 type codetable Type
44-45 stream codetable Stream
46-49 experimentVersionNumber ksec1expver Version number or experiment identifier. (4 ASCII characters, right justified)
50 band unsigned Band: 0 = first infrared band 1 = second infrared band 10 = first visible band 20 = water vapour
51 functionCode unsigned 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
52 Spare (set to zero)