FRM4SOC consortium is led by Tartu Observatory, University of Tartu (TO, Estonia) and includes four partners – Royal Belgian Institute of Natrural Sciences (RBINS, Belgium), National Physical Laboratory (NPL, UK), Plymouth Marine Laboratory (PML, UK) and ACRI-ST (ACRI-ST, France). The members of the Consortium are selected for their expertise in radiometric calibration, validation and development of MERIS ocean colour and of the activities.