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 measurements and with other satellite observations. 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, but the requirement on the random component of the uncertainty often is not fulfilled. Here it should be noted that the current random requirement is very strict (0.15 – 0.3 DU). For the often very high SO2 column values in volcanic plumes it is unrealistic that the random requirement can strictly be fulfilled and it is recommended to reconsider this random requirement. First checks 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.