1. Space Science Laboratory University of Massachusetts Lowell Lowell MA USA
2. Lowell Digisonde International, LLC Lowell MA USA
3. Institute of Solar‐Terrestrial Physics Irkutsk Russia
4. Department of Physics and Astronomy George Mason University Fairfax VA USA
5. Space Physics Data Facility NASA, GSFC Greenbelt MD USA
6. North‐West Research Associates Monterey CA USA
7. South African National Space Agency Hermanus South Africa
8. Instituto Geofisico del Peru Jicamarca Radio Observatory Lima Peru