1. Thales Alenia Space, Turin, Italy
2. GSI Helmholtz Center, Darmstadt, Germany
3. Trento Institute for Fundamental Physics and Applications (TIFPA), National Institute for Nuclear Physics, (INFN), Povo, Italy
4. European Space Agency, Noordwijk, Netherlands
5. NASA Langley Research, Hampton, Virginia
6. Alter Elettronica s.r.l., Casale Monferrato, Italy
7. Delft University of Technology, Delft, Netherlands