OMDOAO3G: Daily Global Gridded Ozone Column from OMI/Aura

A daily global gridded dataset of total column ozone derived from the OMI/Aura satellite using the Differential Absorption Spectroscopy (DOAS) technique on radiance values between 331.1 and 336.1 nm. Each file contains data from the day-lit portion of approximately 14 orbits, stored in HDF-EOS5 format and roughly 80 MB in size. In addition to the primary ozone column, the product includes auxiliary parameters like ozone slant column density and ozone ghost column density.

Use Cases

• Monitoring global ozone layer health based on daily total column measurements.
• Validating atmospheric chemistry models using gridded satellite-derived ozone data.
• Analyzing spatial and temporal ozone trends from the auxiliary derived parameters.
• Studying the impact of specific events on atmospheric composition using the daily global coverage.

Strengths

• Provides daily global coverage from the OMI/Aura satellite instrument.
• Derived using a specific, documented scientific method (DOAS technique on 331.1-336.1 nm radiance).
• Each daily file is a substantial, consistent size (~80 MB), indicating a standardized product.

Limitations

• Column names and detailed schema are not provided in the available metadata.
• The dataset's availability and update status show a conflict: one source lists a last update in 2026, while another lists none.
• Access requires handling of specialized HDF-EOS5 file formats.

Provenance

Source

OMI/Aura satellite, processed by GES DISC with lead algorithm scientist Dr. Pepijn Veefkind (KNMI).

Collection Method

Satellite remote sensing using the Differential Absorption Spectroscopy (DOAS) fitting technique.

Time Range

Daily files, temporal coverage not explicitly stated.

Freshness

2026-04-09 23:17:23.993480

Geography

Global, gridded at 0.25 degree x 0.25 degree resolution.