Level 0
Raw instrument data at original resolution
Time ordered
Duplicate packets removed
Level 1A
Unprocessed instrument data at full resolution
Time referenced
Attached radiometric and geometric calibration coefficients
Attached geo-referencing parameters
Level 1B
Radiometrically corrected
Geo-located
Processed to sensor units
Level 2B
Retrieved geophysical parameters
Same resolution and location as the level 1 data
Level 3B
Summary products derived from Level 2 data or diagnostic output
Reduced resolution – most often a statistical "sample" of level 2 data