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Description
The Aura Ozone Monitoring Instrument (OMI) Version-3 Formaldehyde Product OMHCHO is now available from the NASA Goddard Earth Sciences Data and Information Services Center (GES DISC) for the public access. The shortname for this Level-2 OMI total column Formaldehyde product is OMHCHO. The algorithm leads for this product are the US OMI scientists Dr. Kelly Chance and Dr. Thomas Kurosu from the Harvard-Smithsonian Center, Cambridge, MA. The OMHCHO product contains total vertical column HCHO, standard errors (rms and sigma), quality flags, geolocation and other ancillary information.
The OMHCHO 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 average file size for the OMHCHO data product is about 5 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
Concept ID
C1239966779-GES_DISC
Data State
ACTIVE
Number of Files/Granules
113127
Processing Level
2
Published
Updated
Science Keywords
Carbon And Hydrocarbon Compounds
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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Chance, K. (2007). OMI/Aura Formaldehyde (HCHO) 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/DATA2015 Date Accessed: 2026-04-30
Chance, Kelly. “OMI/Aura Formaldehyde (HCHO) Total Column 1-Orbit L2 Swath 13x24 Km.” NASA Goddard Earth Sciences Data and Information Services Center, 2007. doi:10.5067/AURA/OMI/DATA2015. Date Accessed: 2026-04-30
Chance, Kelly. OMI/Aura Formaldehyde (HCHO) Total Column 1-Orbit L2 Swath 13x24 Km. NASA Goddard Earth Sciences Data and Information Services Center, 2007, doi:10.5067/AURA/OMI/DATA2015. Date Accessed: 2026-04-30
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The table below lists the variables contained within a single granule for this
dataset. Variables often contain observed or derived geophysical measurements
collected from a variety of sources, including remote sensing instruments on
satellite and airborne platforms, field campaigns, in situ measurements, and
model outputs. The terms variable, parameter, scientific data set, layer, and band
have been used across NASA’s Earth science disciplines; however, variable is the
designated nomenclature in NASA’s Common Metadata Repository (CMR).
Variable metadata attributes such as Name, Description, Units, Data Type, Fill
Value, Valid Range, and Scale Factor allow users to efficiently process and analyze
the data. The full range of attributes may not be applicable to all variables.
Additional information on variable attributes is typically available in the data,
user guide, and/or other product documentation.
For questions on a specific variable, please use the Earthdata Forum.