1. Department of Electrical and Computer Engineering, University of Minnesota, 200 Union Street SE, Minneapolis, Minnesota 55455, United States
2. Department of Mechanical Engineering, University of Minnesota, 111 Church Street SE, Minneapolis, Minnesota 55455, United States
3. Department of Physics, Augsburg University, 2211 Riverside Avenue, Minneapolis, Minnesota 55454, United States
4. Department of Climate and Space Sciences and Engineering, University of Michigan, 2455 Hayward Street, Ann Arbor, Michigan 48109, United States