Scientists
Research Grants
Scientific Publications
Informatics Research
NSIDC Scientific Expeditions
Scientists blog from Antarctica and provide a glimpse of what it's like to do research in the field. 
What's hot in the news around climate and sea ice and what are scientists talking about now? Knowledge Base
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. |
