Juha Kainulainen, Harp Technologies Oy, Finland; Steen Savstrup Kristensen, Technical University of Denmark, Denmark; Tapio Saarinen, Josu Uusitalo, Harp Technologies Oy, Finland; Sten Schmidl Søbjærg, Technical University of Denmark, Denmark; Manuel Martín-Neira, European Space Agency, Netherlands