1. NASA Goddard Space Flight Center Greenbelt MD USA
2. George Mason University Fairfax VA USA
3. Laboratory for Atmospheric and Space Physics University of Colorado Boulder CO USA
4. Self ‐ Independent Researcher Thunder Bay ON Canada
5. Department of Maths, Physics and Electrical Engineering Northumbria University Newcastle Upon Tyne UK
6. Sodankylä Geophysical Observatory University of Oulu Finland