1. Department of Physics and AstronomyDartmouth College Hanover New Hampshire USA
2. Applied Physics LaboratoryJohns Hopkins University Laurel Maryland USA
3. Department of PhysicsUniversity of Illinois Urbana Illinois USA
4. Department of Mechanical EngineeringUniversity of Colorado Boulder Colorado USA
5. National Oceanic and Atmospheric Administration Space Weather Prediction Center Boulder Colorado USA
6. Department of PhysicsAuburn University Auburn Alabama USA