MODIS Level 1B
The Level 1B data set contains calibrated and geolocated at-aperture radiances generated from Level 1A sensor counts and GEO files. Details of the algorithm and file specification are available here.
Operational OBPG MODIS Aqua L1B LUTs versus MCST MODIS Aqua L1B LUTs
Operational OBPG MODIS Terra L1B LUTs versus MCST MODIS Aqua L1B LUTs