1. Goddard Space Flight Center of the National Aeronautics and Space Administration, Greenbelt, MD, USA
2. European Commission, Joint Research Centre (JRC), Ispra, Italy
3. Departament de Oceanografía Física i Tecnológica, Institut de Ciències del Mar (ICM-CSIC), and the Barcelona Expert Centre (BEC), Barcelona, Spain
4. EUMETSAT, Remote Sensing and Products Division, Darmstadt, AG, Germany