1. Birkeland Centre for Space Science, Department of Physics and TechnologyUniversity of Bergen Bergen Norway
2. INAF‐OAS Bologna Bologna Italy
3. ENEA Bologna Italy
4. Electrical and Computer Engineering DepartmentDuke University Durham NC USA
5. INAF‐IAPS Roma Rome Italy
6. INAF Rome Italy
7. INAF‐Osservatorio Astronomico di Cagliari Selargius (CA) Italy
8. Space Science Data Center‐Agenzia Spaziale Italiana Rome Italy