OMTO3d: Daily Global Ozone and Aerosol Satellite Grids

Daily global satellite data provides measurements of total column ozone, aerosol index, and cloud radiance fraction on a 1-degree latitude/longitude grid. The OMI science team produces this Level-3 product by gridding and averaging quality-controlled orbital swath data from the Ozone Monitoring Instrument (OMI) on the Aura satellite, using an enhanced TOMS version-8 algorithm. Each file contains data from approximately 15 orbits and is stored in the HDF-EOS5 format.

Use Cases

• Monitoring global ozone layer depletion and recovery based on daily total column ozone measurements.
• Tracking long-range transport of aerosols like dust and smoke using the daily aerosol index.
• Analyzing daily cloud cover and its radiative influence using the cloud radiance fraction data.
• Studiating seasonal and interannual variability in atmospheric composition from the gridded time series.

Strengths

• Data is processed using an enhanced, peer-reviewed algorithm (TOMS version-8).
• Provides daily, global coverage on a consistent 1x1 degree grid.
• Files are relatively compact, with a maximum size of about 0.65 Mbytes.

Limitations

• Key metadata such as row count, specific column names, and exact file size are unavailable from the sources.
• Sources conflict on license information, with one specifying 'other-license-specified' and another providing no license.
• The 'last updated' date of 2026-04-09 appears to be a placeholder or future date, casting doubt on metadata freshness.

Provenance

Source

National Aeronautics and Space Administration (NASA) OMI science team

Collection Method

Gridded and averaged from Level-2 orbital swath data collected by the Ozone Monitoring Instrument (OMI) on the Aura satellite.

Time Range

Daily coverage (specific date range not provided)

Freshness

2026-04-09 23:16:52.794023 (Note: This appears to be a future/placeholder date)

Geography

Global coverage at 1-degree latitude/longitude resolution