1. Department of Physics and Astronomy; University of Florence; Florence Italy
2. INFN; Sezione di Florence; Florence Italy
3. Department of Physics; University of Naples “Federico II”; Naples Italy
4. INFN; Sezione di Naples; Naples Italy
5. Lebedev Physical Institute; Moscow Russia
6. Department of Physics; University of Bari; Bari Italy
7. INFN; Sezione di Bari; Bari Italy
8. INFN; Sezione di Trieste; Trieste Italy
9. Ioffe Physical Technical Institute; St. Petersburg Russia
10. KTH, Department of Physics, and the Oskar Klein Centre for Cosmoparticle Physics; AlbaNova University Centre; Stockholm Sweden
11. INFN; Sezione di Rome “Tor Vergata”; Rome Italy
12. Advanced Science Institute; RIKEN; Wako Japan
13. IFAC; Florence Italy
14. Department of Physics; University of Rome “Tor Vergata”; Rome Italy
15. Agenzia Spaziale Italiana Science Data Center; Rome Italy
16. Department of Physics; University of Trieste; Trieste Italy
17. National Research Nuclear University MEPhI; Moscow Russia
18. INFN; Laboratori Nazionali di Frascati; Rome Italy
19. Department of Physics; Universität Siegen; Siegen Germany
20. Indian Centre for Space Physics; West Bengal India
21. Previously at INFN; Sezione di Trieste; Trieste Italy