The Mission Performance Centre (MPC) is responsible for the quality control, calibration, validation and end-to-end system performance monitoring of the S5P mission during the routine phase. MPC validation activities rely primarily on the usage of Fiducial Reference Measurements (FRMs), which are a suite of independent, fully characterized, and traceable ground measurements that follow the guidelines outlined by the GEO/CEOS Quality Assurance framework for Earth Observation (QA4EO). FRMs will be progressively being available on the ESA Atmospheric Validation Data Centre (EVDC). In addition, within the framework of its Copernicus missions, ESA opened a call for the Sentinel-5 Precursor Calibration Validation Team (S5PVT) in 2014, that aimed to engage leading expertise for the Calibration and Validation of the S5P in the mission validation team, providing independent experimental data, analysis and recommendations to critically assess the end-to-end performance of the instrument and its products. This call is permanently open.

All the information is further processed in the Quality Working Group, which provide synthetic results to the Mission Manager for improving the quality and knowledge of the products.

The validation program benefits also from the feedback from Workshops/Conferences, bilateral relations and the coordination within the CEOS WGCV.