OMDOAO3Z: Satellite-Based Total Ozone Column Measurements at 13x12 km Resolution

OMI/Aura DOAS Total Column Ozone Zoomed 1-Orbit L2 Swath 13x12km V003 (OMDOAO3Z) is a reprocessed satellite dataset providing high-resolution total ozone column measurements. The data is based on the Differential Absorption Spectroscopy (DOAS) algorithm using visible radiance between 331.1 and 336.1 nm, developed by KNMI scientist Dr. Pepijn Veefkind. Each HDF-EOS5 file contains approximately 53 minutes of daytime orbital data, with one day of zoomed observations (about 14 orbits) generated per month.

Use Cases

• Monitoring global and regional ozone column density based on the DOAS retrieval algorithm.
• Analyzing the influence of cloud fraction and cloud pressure on ozone measurements.
• Validating other ozone products (e.g., OMTO3) using the auxiliary parameters like slant column density and air mass factor.
• Studying geospatial patterns of atmospheric ozone using the 13x12 km resolution swath data.
• Assessing data quality for scientific publications using the provided quality flags and root mean square of the DOAS fit.

Strengths

• Provides high spatial resolution (13x12 km) for detailed ozone mapping, compared to the standard 13x24 km product.
• Contains multiple derived parameters (e.g., cloud fraction, scene reflectivity, viewing angles) supporting in-depth atmospheric analysis.
• Dataset is hosted and maintained by the authoritative NASA GES DISC, indicating institutional reliability.
• Cross-platform presence on NASA Earthdata and Data.gov signals its importance and public accessibility.

Limitations

• Temporal coverage is sparse, with zoomed data collected only one day per month.
• Specific column names and a complete data schema are not provided in the available metadata.
• The reprocessing date (late 2011) and version (V003) suggest the dataset may not represent the most recent algorithm version.

Provenance

Source

NASA Goddard Earth Sciences Data and Information Services Center (GES DISC)

Collection Method

Satellite remote sensing via the Ozone Monitoring Instrument (OMI) aboard the Aura spacecraft, using the DOAS fitting technique.

Time Range

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Freshness

2026-04-09 23:18:16.504817

Geography

Global coverage from satellite swaths.