1. a VTT Automation , PO Box 13002, Fin-02044, VTT, Finland
2. b ESA , Esprin Via Galileo Galilei , Casello Postale 64, Franscati, 00044, Italy
3. c Space Systems Finland , Kappelitie 6, Espog, Fin-02200, Finland
4. d Finnish Meteorological Institute , Helsinki, PO Box 503, Fin-00101, Finland
5. e Joint Research Centre , Space Applications Institute , Via Fermi, Ispra, I-21020, Italy
6. f Ministry of Interior of Finland , PO Box 257, Helsinki, Fin-00171