Daily Global Ozone Column Grids from Aura/OMI Satellite

OMI/Aura Ozone (O3) Total Column Daily L3 Global 0.25deg Lat/Lon Grid NRT provides daily, near-real-time global maps of total atmospheric ozone concentration. The OMI science team generates this product by selecting the best pixel data from filtered level-2 measurements and gridding them onto a 0.25 x 0.25 degree global lattice. Each daily file contains data from approximately 15 satellite orbits and includes total column ozone, radiative cloud fraction, and solar and viewing zenith angles.

Use Cases

• Tracking the spatial and temporal evolution of the ozone layer and identifying anomalies.
• Studying the relationship between total column ozone and radiative cloud fraction across different regions.
• Analyzing the influence of solar and viewing zenith angles on satellite ozone retrievals.
• Providing input data for atmospheric chemistry and climate models that require global ozone fields.
• Monitoring long-term trends in stratospheric ozone for environmental assessment reports.

Strengths

• Data is provided in near-real-time (NRT), supporting timely analysis of current atmospheric conditions.
• Offers a high spatial resolution global grid of 0.25 x 0.25 degrees for detailed mapping.
• Each data file is processed to select the best pixel (shortest path length) from quality-filtered level-2 inputs.
• The dataset's cross-platform presence on NASA Earthdata and Data.gov signals its established importance and reliability.

Limitations

• Key technical specifications like row count, total size, and complete column list are unavailable from all sources.
• Sources conflict on license information, with one specifying 'other-license-specified' and another listing 'None'.
• The temporal coverage (start and end dates) for the dataset series is not provided.

Provenance

Source

OMI science team / OMINRT.

Collection Method

Satellite remote sensing data from the Aura/OMI instrument, processed to Level-3 gridded product (OMTO3e).

Time Range

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Freshness

2026-03-12 22:45:35.896429

Geography

Global.