OMTO3e: Daily Global Ozone and Cloud Fraction from Aura/OMI

NASA's OMI science team produces the OMTO3e Level-3 gridded product from the Aura satellite's Ozone Monitoring Instrument. The dataset provides daily global maps of total column ozone, radiative cloud fraction, and solar/viewing zenith angles on a 0.25-degree latitude/longitude grid. Each file, stored in HDF-EOS5 format, contains data from approximately 15 orbits with a maximum size of about 2.8 Mbytes.

Use Cases

• Monitoring long-term trends in stratospheric ozone depletion based on daily global column measurements.
• Studying the relationship between cloud cover and surface UV radiation using the radiative cloud fraction variable.
• Validating atmospheric chemistry and climate models with satellite-derived, gridded ozone data.
• Analyzing spatial patterns of ozone distribution at a 0.25-degree resolution for regional environmental assessments.

Strengths

• Data is produced by the NASA OMI science team, indicating institutional authority.
• Provides daily global coverage at a consistent 0.25-degree spatial resolution.
• Files use a standardized, well-documented format (HDF-EOS5) with a manageable maximum size of about 2.8 MB.

Limitations

• Key metadata such as row count, column names, and precise temporal coverage is unavailable across all sources.
• The license is ambiguously listed as 'other-license-specified' without clear terms for reuse.
• Descriptions are identical across platforms, suggesting potential metadata replication rather than independent curation.

Provenance

Source

National Aeronautics and Space Administration (NASA), OMI science team, Aura satellite.

Collection Method

Satellite remote sensing; level-2 data filtered for quality and gridded to create level-3 product.

Freshness

2026-04-09 23:27:58.491254

Geography

Global