1. The Johns Hopkins University Applied Physics Laboratory Laurel Maryland USA
2. Institute and Faculty of PhysicsSaint Petersburg State University Saint Petersburg Russia
3. Department of Earth, Ocean and Atmospheric SciencesUniversity of British Columbia Vancouver British Columbia Canada
4. Planetary Science Institute Tucson Arizona USA
5. Saudi Aramco Dharan Saudi Arabia
6. Department of Terrestrial MagnetismCarnegie Institution of Washington Washington District of Columbia USA
7. Lamont‐Doherty Earth ObservatoryColumbia University Palisades New York USA