Climate Data

NASA Satellite Product Levels

NASA data products are categorized into different "Levels". These are product dependent but the following description for OMI (Ozone Monitoring Instrument) data products is a general guideline:

Level-1B  (L1B): Products containing geolocated and calibrated spectral radiance and solar irradiance data.

Level-2 (L2): Atmospheric products derived from the L1B product. One file per orbit.

L2G: Daily binned global products derived from the L2 products.

Level-3 (L3): Averaged global gridded products, screened for bad data points.

Post-Processing involves changes only in ancillary data or information.

Re-Processing indicates data processing due to changes in the Retrieval Algorithms.

See also: EOS-DIS data product levels.

Key Figures

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Climate Data Guide Image: Guide to NASA product levels Guide to NASA product levels

Cite this page

National Center for Atmospheric Research Staff (Eds). Last modified 13 Jan 2014. "The Climate Data Guide: NASA Satellite Product Levels." Retrieved from

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