OMDOAO3e: Global Daily Ozone Column Measurements from Aura/OMI

OMI/Aura OMDOAO3e is a Level-3 satellite-derived dataset providing daily global total column ozone measurements on a 0.25-degree latitude/longitude grid. The data is produced using the Differential Absorption Spectroscopy (DOAS) technique on visible radiance between 331.1 and 336.1 nm and includes ancillary parameters like cloud fraction and height. Each daily file covers the sunlit portion of approximately 14 orbits and is stored in HDF-EOS5 format.

Use Cases

• Monitoring global ozone layer health based on daily total column measurements.
• Analyzing correlations between ozone levels and cloud parameters like cloud fraction and height.
• Tracking spatial and temporal ozone trends using the 0.25-degree gridded, daily time-series data.
• Validating atmospheric chemistry models with satellite-derived ozone column observations.

Strengths

• Provides daily global coverage with a consistent 0.25-degree spatial grid.
• Data generation is based on a defined scientific method (DOAS technique using 331.1-336.1 nm radiance).
• Includes ancillary atmospheric parameters (cloud fraction, cloud height) alongside the primary ozone measurement.

Limitations

• Column names and a detailed data dictionary are not provided in the available metadata.
• The dataset's temporal coverage (start/end dates) is not specified.
• Exact file size and row counts are not uniformly reported across sources.

Provenance

Source

Ozone Monitoring Instrument (OMI) on NASA's Aura satellite, processed by the OMI science team with lead algorithm scientist Dr. Pepijn Veefkind (KNMI).

Collection Method

Derived from Level-2 OMDOAO3 data using the Differential Absorption Spectroscopy (DOAS) fitting technique.

Time Range

Daily files; specific date range not provided.

Freshness

Last updated metadata date is 2026-04-09.

Geography

Global coverage.