1. Department of PhysicsUmeå University Umeå Sweden
2. Belgian Institute for Space Aeronomy Brussels Belgium
3. Space Research InstituteAustrian Academy of Sciences Graz Austria
4. Laboratory for Atmospheric and Space PhysicsUniversity of Colorado Boulder Boulder CO USA
5. Space and Plasma Physics, School of Electrical EngineeringKTH Royal Institute of Technology Stockholm Sweden
6. Shandong Provincial Key Laboratory of Optical Astronomy and Solar‐Terrestrial EnvironmentInstitute of Space Sciences, Shandong University Weihai China
7. Department of PhysicsUniversity of New Hampshire Durham NH USA
8. Swedish Institute of Space Physics Kiruna Sweden