1. Department of Physics and AstronomyUniversity of Kansas Lawrence KS USA
2. Department of Climate and Space Sciences and EngineeringUniversity of Michigan Ann Arbor MI USA
3. Institute of Geophysics and Planetary PhysicsUniversity of California Los Angeles CA USA
4. Laboratory for Atmospheric and Space PhysicsUniversity of Colorado Boulder CO USA
5. Space Sciences LaboratoryUniversity of California‐Berkeley Berkeley CA USA