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Description
The Aura Ozone Monitoring Instrument (OMI) Level-2 Total Column Ozone Data Product OMTO3 (Collection Version 004) is available from the NASA Goddard Earth Sciences Data and Information Services Center (GES DISC) for the public access. This level-2 global total column ozone product (OMTO3) is based on the enhanced TOMS version-8 algorithm that essentially uses the ultraviolet radiance data at 317.5 and 331.2 nm at a pixel resolution of 13 x 24 km at nadir. OMI hyper-spectral measurements help in the corrections for the factors that induce uncertainty in ozone retrievals (e.g., cloud and aerosol, sea-glint effects, profile shape sensitivity, SO2 and other trace gas contamination). In addition to the total ozone values this product also contains some auxiliary derived and ancillary input parameters including N-values, effective Lambertian scene-reflectivity, cloud fraction, cloud pressure, ozone below clouds, terrain height, geolocation, solar and satellite viewing angles, and quality flags. The shortname for this Level-2 OMI total column ozone product is OMTO3. The algorithm for this product was originally developed by a team led by Dr. Pawan K. Bhartia at NASA Goddard Space Flight Center. The current product lead is Dr. Can Li.
The OMTO3 files are stored in the version 5 EOS Hierarchical Data Format (HDF-EOS5). Each file contains data from the day lit portion of an orbit (~53 minutes). There are approximately 14 orbits per day. The maximum file size for the OMTO3 data product is approximately 35 MB.
Goddard Earth Sciences Data and Information Services Center (formerly Goddard DAAC), Terrestrial Information Systems Laboratory, Earth Sciences Division, Science and Exploration Directorate, Goddard Space Flight Center, NASA (NASA/GSFC/SED/ESD/TISL/GESDI
Citation is critically important for dataset documentation and discovery. This dataset is openly shared, without restriction, in accordance with the EOSDIS Data Use and Citation Guidance.
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Bhartia, P. K. (2025). OMI/Aura Ozone(O3) Total Column 1-Orbit L2 Swath 13x24 km [Data set]. NASA Goddard Earth Sciences Data and Information Services Center. https://doi.org/10.5067/AURA/OMI/DATA2424 Date Accessed: 2026-05-27
Bhartia, Pawan K. “OMI/Aura Ozone(O3) Total Column 1-Orbit L2 Swath 13x24 Km.” NASA Goddard Earth Sciences Data and Information Services Center, 2025. doi:10.5067/AURA/OMI/DATA2424. Date Accessed: 2026-05-27
Bhartia, Pawan K. OMI/Aura Ozone(O3) Total Column 1-Orbit L2 Swath 13x24 Km. NASA Goddard Earth Sciences Data and Information Services Center, 2025, doi:10.5067/AURA/OMI/DATA2424. Date Accessed: 2026-05-27
Liu, Junhua, Strode, Sarah A., Liang, Qing, Oman, Luke D., Colarco, Peter R., Fleming, Eric L., Manyin, Michael E., Douglass, Anne R., Ziemke, Jerald R., Lamsal, Lok N., Li, Can
Stauffer, Ryan M., Thompson, Anne M., Kollonige, Debra E., Tarasick, David W., Van Malderen, Roeland, Smit, Herman G. J., Vomel, Holger, Morris, Gary A., Johnson, Bryan J., Cullis, Patrick D., Stubi, Rene, Davies, Jonathan, Yan, Michael M.