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Description
The Level-2 Aura Ozone Monitoring Instrument (OMI) Cloud Pressure and Fraction (O2-O2 Absorption) Product (OMCLDO2) version 4 is now available from NASA Goddard Earth Sciences Data and Information Services Center (GES DISC) for public access. The data was re-processed in December 2022 using collection 4 Level 1b data and the OMCLDO2 processor version 4.0.0. Since then, this version of the product is also being produced in the forward stream. This version of the product was publicly released in March 2026.
OMI provides two cloud products based on two different algorithms, the Rotational Raman Scattering method, and O2-O2 absorption method using the DOAS technique. This level-2 global cloud product, with a pixel resolution of 13x24 km2 at nadir, is based on the spectral fitting of O2-O2 absorption band at 477 nm using DOAS technique. This product contains cloud pressure, cloud fraction, slant column O2-O2, ozone, ring coefficients, uncertainties in derived parameters, terrain and geolocation information, solar and satellite viewing angles, and quality flags. The lead scientist for this product is Dr. Pepijn Veefkind.
The OMCLDO2 files are stored in netCDF 4 format. 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 OMCLDO2 data product is about 13 Mbytes.
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
Concept ID
C3454342631-GES_DISC
Data State
ACTIVE
Number of Files/Granules
112269
Processing Level
2
Published
Updated
Science Keywords
Cloud Fraction
,
Cloud Top Pressure
Citation
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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Veefkind, P. (2026). OMI/Aura Cloud Pressure and Fraction (O2-O2 Absorption) 1-Orbit L2 Swath 13x24km [Dataset]. NASA Goddard Earth Sciences Data and Information Services Center. https://doi.org/10.5067/AURA/OMI/DATA2407 Date Accessed: 2026-07-07
Veefkind, P. (2026). OMI/Aura Cloud Pressure and Fraction (O2-O2 Absorption) 1-Orbit L2 Swath 13x24km [Dataset]. NASA Goddard Earth Sciences Data and Information Services Center. https://doi.org/10.5067/AURA/OMI/DATA2407 Date Accessed: 2026-07-07
Veefkind, Pepijn. “OMI/Aura Cloud Pressure and Fraction (O2-O2 Absorption) 1-Orbit L2 Swath 13x24km.” NASA Goddard Earth Sciences Data and Information Services Center, 2026, https://doi.org/10.5067/AURA/OMI/DATA2407. Date Accessed: 2026-07-07
Carboni, E., Thomas, G. E., Sayer, A. M., Siddans, R., Poulsen, C. A., Grainger, R. G., Ahn, C., Antoine, D., Bevan, S., Braak, R., Brindley, H., DeSouza-Machado, S., Deuze, J. L., Diner, D., Ducos, F., Grey, W., Hsu, C., Kalashnikova, O. V., Kahn, R., North, P. R. J., Salustro, C., Smith, A., Tanre, D., Torres, O., Veihelmann, B.
Boersma, K. F., Eskes, H. J., Dirksen, R. J., van der A, R. J., Veefkind, J. P., Stammes, P., Huijnen, V., Kleipool, Q. L., Sneep, M., Claas, J., Leitao, J., Richter, A., Zhou, Y., Brunner, D.
Hains, Jennifer C., Boersma, K. Folkert, Kroon, Mark, Dirksen, Ruud J., Cohen, Ronald C., Perring, Anne E., Bucsela, Eric, Volten, Hester, Swart, Daan P. J., Richter, Andreas, Wittrock, Folkard, Schoenhardt, Anja, Wagner, Thomas, Ibrahim, Ossama W., van Roozendael, Michel, Pinardi, Gaia, Gleason, James F., Veefkind, J. Pepijn, Levelt, Pieternel
Wu, D. L., Ackerman, S. A., Davies, R., Diner, D. J., Garay, M. J., Kahn, B. H., Maddux, B. C., Moroney, C. M., Stephens, G. L., Veefkind, J. P., Vaughan, M. A.