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For more than 20 years, the UV-Vis remote-sensing team at BIRA has been investigating the chemical composition of the atmosphere using remote sensing observations from the ground and from space. The team focuses on improving the capabilities of the UV-Vis technique through instrumental and retrieval algorithm developments. Multi-axis DOAS instruments designed at BIRA are used for long-term monitoring at several observation sites in Europe, China and Africa as part of the Network for the Detection of Atmospheric Composition Change (NDACC). They are also regularly deployed in international field campaigns. Next to its ground-based activities, the team develops scientific retrieval algorithms for the European nadir UV-Vis sensors GOME, SCIAMACHY, GOME-2 and OMI, partly in support of the operational data centers at ESA/DLR and EUMETSAT/O3M-SAF. It is also involved in the preparation of future satellite sensors such as Sentinel 4 and 5, and more particularly Sentinel 5 Precursor which is due to be launched in 2015. In recent years, the team has initiated the development of new instrumentations. Several pioneering experiments have been conducted using aircrafts and ULMs. BIRA has also been involved in an EMPA-lead study on the demonstration of APEX for pollution NO2 mapping in Switzerland. The team routinely collaborates with institutions worldwide.