The CORSO consortium is comprised of 16 partners from 8 European countries (Germany, Netherlands, France, Poland, Spain, Sweden, Switzerland, and the United Kingdom). Through ECMWF (an International European Research Organisation), the reach is extended beyond these countries due to the member and cooperating states of this international organisation. The partnership has been chosen to bring together the expertise needed to deliver the project. The coordinator ECMWF is the Entrusted Entity for the Coperncius Atmosphere Monitoring Service and also the coordinator of the CHE and CoCO2 projects. This ensures very close links with the overall implementation process of the CO2MVS to which CORSO is contributing.