1. CNR\IEIITi c/o DEI -Politecnico di Milano, Milano (Italy)
2. Fondazione Ugo Bordoni, Roma (Italy)
3. University of L'Aquila, Dept of Electrical and Information Engineering, L'Aquila (Italy)
4. University of Perugia, Dept. of Electronics and Information Engineering, Perugia (Italy)
5. European Space Agency, ESTEC, TEC-EEP, Noordwijk (Netherlands)