OMTO3d: Daily Global Ozone and Aerosol Index Grids

OMI/Aura satellite data provides daily global maps of total column ozone and ultraviolet aerosol index on a 1-degree latitude/longitude grid. Each file contains measurements from approximately 15 orbits, processed using the enhanced TOMS version-8 algorithm and stored in HDF-EOS5 format. This Level-3 product is generated by gridding and averaging only quality-screened orbital swath data.

Use Cases

• Monitoring stratospheric ozone depletion trends based on daily global total column ozone grids.
• Tracking atmospheric dust and smoke transport using the ultraviolet aerosol index.
• Validating and improving atmospheric chemistry models with satellite-derived ozone concentration data.
• Studying long-term changes in atmospheric composition from the consistent time series.

Strengths

• Data is produced by the OMI science team, indicating authoritative processing.
• Provides daily global coverage on a consistent 1x1 degree grid.
• Uses an enhanced, version-8 algorithm for calculating total column ozone.
• Each data file has a defined maximum size of about 0.65 Mbytes, ensuring manageable file sizes.

Limitations

• Column names and detailed data structure are not provided in the available metadata.
• The exact temporal coverage (start and end dates) is not specified.
• License is listed only as 'other-license-specified', requiring further investigation for reuse.

Provenance

Source

OMI/Aura satellite instrument, processed by the OMI science team at GES DISC.

Collection Method

Gridding and averaging of quality-screened Level-2 orbital swath data (OMTO3) onto a global 1x1 degree grid.

Time Range

Daily coverage; specific date range not provided.

Freshness

Last updated metadata date is 2026-04 09.

Geography

Global coverage.