Product Level Definitions
Level 0 - Reconstructed unprocessed instrument/payload data at full resolution; any and all communications artifacts (e.g., synchronization frames, communications headers) removed.
Level 1A - Reconstructed unprocessed instrument data at full resolution, time-referenced, and annotated with ancillary information, including radiometric and geometric calibration coefficients and georeferencing parameters (i.e., platform ephemeris) computed and appended, but not applied, to the Level 0 data.
Level 1B - Level 1A data that have been processed to sensor units (not all instruments have a Level 1B equivalent).
Level 2 - Derived geophysical variables at the same resolution and location as the Level 1 source data.
Level 3 - Variables mapped on uniform space-time grid scales, usually with some completeness and consistency.
Level 4 - Model output or results from analyses of lower level data (e.g., variables derived from multiple measurements).
EOS Data Products Handbook - Volume 2
EOS Project Science Office
NASA/Goddard Space Flight Center
Greenbelt, MD 20771
