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What do the various levels of AMSR-E data represent?
The following table describes the different levels of AMSR-E data.
| Level-0 | Reconstructed, unprocessed instrument/payload data at full resolution; any and all communications artifacts, for example, synchronization frames, communications headers, and duplicate data 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. For example, 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 will have a Level-1B equivalent. |
| Level-2 | Derived geophysical variables at the same resolution and location as the Level-1 source data. |
| Level-3 | Derived geophysical 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. For example, variables derived from multiple measurements. |
