1. Transvalor S. A., 06904 Sophia Antipolis, France
2. Finnish Meteorological Institute, 70211 Kuopio, Finland
3. Department of Physics, Faculty of Science, University of Yaoundé I, Yaoundé P.O. Box 812, Cameroon
4. Finnish Meteorological Institute, Meteorological Research, 00560 Helsinki, Finland
5. Satellite-Based Climate Monitoring, Deutscher Wetterdienst, Frankfurter Str. 135, 63067 Offenbach am Main, Germany
6. School of Environmental Sciences, University of East Anglia, Norwich NR4 7TJ, UK
7. Laboratorio de Energía Solar, Universidad de la República, Montevideo 11300, Uruguay
8. Global Change Research Institute of the Czech Academy of Sciences, 603 00 Brno, Czech Republic
9. Institute of Applied Physics (IAP), Moldova State University (MSU), 2028 Chisinau, Moldova