1. Department of Electrical and Computer Engineering; Virginia Polytechnic Institute and State University; Blacksburg VA USA
2. Department of Climate and Space Science and Engineering; University of Michigan; Ann Arbor MI USA
3. Applied Physics Laboratory; The Johns Hopkins University; Laurel MD USA
4. National Oceanic and Atmospheric Administration; Boulder CO USA
5. Southwest Research Institute; San Antonio TX USA
6. Department of Physics and Astronomy; University of Iowa; Iowa City IA USA
7. Space Science Laboratory; University of California; Berkeley CA USA