1. Cooperative Institute for Research in Environmental Sciences; University of Colorado Boulder; Boulder Colorado USA
2. Department of Aerospace Engineering Sciences; University of Colorado Boulder; Boulder Colorado USA
3. Space Weather Prediction Center; NOAA; Boulder Colorado USA
4. Department of Electrical and Computer Engineering; University of Illinois at Urbana-Champaign; Urbana Illinois USA
5. Department of Physics and Astronomy; University of Canterbury; Christchurch New Zealand