1. Department of Electrical and Computer Engineering and Coordinated Science Laboratory University of Illinois at Urbana‐Champaign Urbana IL USA
2. Leibniz‐Institute for Atmospheric Physics University of Rostock Kuehlungsborn Germany
3. Space Sciences Laboratory University of California‐Berkeley Berkeley CA USA
4. Syntek Technologies Fairfax VA USA
5. Virginia Polytechnic and State University Blacksburg VA USA