S5P_L2__O3_TOT_HiR_NRT: Near-Real-Time Global Ozone Measurements

Sentinel-5P TROPOMI data provides total vertical column ozone measurements at a spatial resolution of 5.5km x 3.5km. Each ~40 MB file contains one orbit of data, processed using the Direct-fitting algorithm (S5P_TO3_GODFIT) and available within three hours of measurement for rapid assessment. This near-real-time product is archived for up to ten days and is part of the European Space Agency's Atmospheric Composition Sentinel mission.

Use Cases

• Monitoring stratospheric ozone depletion events based on total vertical column ozone data.
• Assimilating near-real-time ozone fields into weather and air quality forecast models.
• Providing rapid input for public health advisories related to UV index and surface ozone levels.
• Validating and calibrating other satellite or ground-based ozone measurement systems.

Strengths

• Provides data within three hours of satellite measurement, enabling rapid operational use.
• Offers high spatial resolution (5.5km x 3.5km) for detailed global ozone mapping.
• Based on the Sentinel-5P/TROPOMI instrument, a state-of-the-art hyperspectral spectrometer covering UV-VIS to SWIR wavelengths.
• Dataset is hosted on multiple authoritative platforms (NASA GES DISC, Data.gov), indicating reliability and broad access.

Limitations

• Data is only archived for up to ten days, limiting its utility for long-term trend analysis.
• Key metadata such as row count, specific column names, and precise license terms are not provided across sources.
• Intended for rapid assessment; users requiring rigorous analysis are directed to the offline product version.

Provenance

Source

European Space Agency (ESA) Copernicus Sentinel-5P mission, processed by the GES DISC.

Collection Method

Satellite remote sensing via the TROPOMI instrument, using a non-linear least squares inversion (Direct-fitting algorithm).

Time Range

Near-real-time, with data availability starting from the mission's operational date (not specified in input).

Freshness

2026-04-09 22:24:56.116279

Geography

Global coverage from a sun-synchronous orbit.