Atmospheric Measurement Techniques
Atmospheric Measurement Techniques
AMT
Articles | Volume 18, issue 17
Articles | Volume 18, issue 17
https://doi.org/10.5194/amt-18-4131-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/amt-18-4131-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 18, issue 17
Research article
 | 
05 Sep 2025
Research article |  | 05 Sep 2025

Harmonized cloud datasets for the Ozone Monitoring Instrument (OMI) and TROPOspheric Monitoring Instrument (TROPOMI) using the O2–O2 477 nm absorption band

Huan Yu, Isabelle De Smedt, Nicolas Theys, Maarten Sneep, Pepijn Veefkind, and Michel Van Roozendael

Data sets

OMI/Aura Level 1B Averaged Solar Irradiances V004 Q. Kleipool https://doi.org/10.5067/Aura/OMI/DATA1401

OMI/Aura Level 1B VIS Global Geolocated Earthshine Radiances V004 Q. Kleipool https://doi.org/10.5067/AURA/OMI/DATA1404

TROPOMI Level 1B Irradiance products Copernicus Sentinel-5P https://doi.org/10.5270/S5P-mhtbru8

TROPOMI Level 1B Radiance products Copernicus Sentinel-5P https://doi.org/10.5270/S5P-kb39wni

TROPOMI Level 2 Nitrogen Dioxide total column products Copernicus Sentinel-5P https://doi.org/10.5270/S5P-9bnp8q8

A directional surface reflectance climatology determined from TROPOMI observations (https://www.temis.nl/surface/albedo/) L. G. Tilstra et al. https://doi.org/10.5194/amt-17-2235-2024

CAMS global reanalysis (EAC4) Copernicus Atmosphere Monitoring Service https://doi.org/10.24381/d58bbf47

Model code and software

QDOAS Software User Manual (https://uv-vis.aeronomie.be/software/QDOAS/) T. Danckaert et al. https://uv-vis.aeronomie.be/software/QDOAS/QDOAS_manual.pdf

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Short summary
We introduce a new cloud retrieval algorithm using the O2–O2 absorption band at 477 nm to generate harmonized cloud datasets from OMI and TROPOMI. The algorithm improves upon the OMI O2–O2 operational cloud algorithm in several aspects. The new approach improves consistency in cloud parameters and NO2​ retrievals between two sensors.
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