Tropomi provides one NO2 data product:

Nitrogen dioxide

This page shows the most recent validation reports.

Most recent contributions
Quarterly Validation Report of the Sentinel-5 Precursor Operational Data Products #01: July – October 2018
This document reports consolidated results of the routine operations validation service for the Sentinel-5 Precursor Tropospheric Monitoring Instrument.
First validation results for Sentinel-5p NO2 column data.

This report describes initial validation results for Sentinel-5p TROPOMI L2_NO2 tropospheric column, stratospheric column and total column data: tropospheric and total NO2 column data retrieved with the OFFL processor (v1.0.1), and stratospheric column data retrieved with the OFFL processor (v1.0.1) and the NRTI processor (v1.0.2).
The validation analyses summarised in this article were carried out in May and June 2018 and reported at the 1st Product Release Workshop held at ESA/ESRIN on June 25-26, 2018.