1. Department of Physics National & Kapodistrian University of Athens Athens Greece
2. IAASARS‐National Observatory of Athens Athens Greece
3. Space Applications & Research Consultancy, SPARC G.P. Athens Greece
4. Hellenic Space Center Athens Greece
5. Istituto Nazionale di Geofisica e Vulcanologia Rome Italy
6. INAF‐Istituto di Astrofisica e Planetologia Spaziali Rome Italy
7. Johns Hopkins University Applied Physics Laboratory Laurel MD USA
8. ESRIN European Space Agency Frascati Italy