Articles | Volume 13, issue 7
Atmos. Meas. Tech., 13, 3751–3767, 2020
https://doi.org/10.5194/amt-13-3751-2020

Special issue: TROPOMI on Sentinel-5 Precursor: first year in operation (AMT/ACP...

Atmos. Meas. Tech., 13, 3751–3767, 2020
https://doi.org/10.5194/amt-13-3751-2020

Research article 10 Jul 2020

Research article | 10 Jul 2020

TROPOMI–Sentinel-5 Precursor formaldehyde validation using an extensive network of ground-based Fourier-transform infrared stations

Corinne Vigouroux et al.

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Latest update: 25 Feb 2021
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Short summary
We validate the TROPOMI HCHO product with ground-based FTIR (Fourier-transform infrared) measurements from 25 stations. We find that TROPOMI overestimates HCHO under clean conditions, while it underestimates it at high HCHO levels. Both TROPOMI precision and accuracy reach the pre-launch requirements, and its precision can even be 2 times better. The observed TROPOMI seasonal variability is in agreement with the FTIR data. The TROPOMI random uncertainty and data filtering should be refined.