Validation Summary

The Sentinel-5p TROPOMI L2_AER_AI (NRTI and OFFL) UV Aerosol Absorbing Index data is in good overall agreement with similar satellite data products from EOS-Aura OMI and Suomi-NPP OMPS. Although compliant with the mission requirement of 1 UVAI unit in 2018, the bias is currently slightly larger than 1 UVAI unit as compared to OMI and OMPS. The reasons for this increasing bias are related to wavelength-dependent degradation and are currently under investigation.