Article Index

Sentinel-5p TROPOMI provides one SO2 data product:

Sulphur dioxide


Validation Summary


The Sentinel-5p TROPOMI L2_SO2 (NRTI and OFFL) sulphur dioxide column data are found in general good agreement with ground-based MAX-DOAS and PGN measurements and with other satellite observations from OMI and S-NPP OMPS. The bias and dispersion with respect to validation data are typically below 0.2 DU. From these comparisons it can be concluded that over polluted regions the mission requirements are fulfilled. Over volcanic plumes the requirement on the bias is fulfilled, while the dispersion can exceed slightly the requirement on the random component of the uncertainty. Here it should be noted that detailed validation of SO2 in volcanic plumes based on ground based observations is still lacking.

Validation of the UPAS processor upgrade to version 02.01.03 released in July 2020 show good consistency of the SO2 data product before and after the processor switch. Later upgrades to version 02.01.04 in December 2020, to version 02.02.01 in July 2021, and to version 02.03.00 in March 2022 (improved background correction), had no effect on S5P L2_SO2 data quality.