1. Department of Physics Augsburg University Minneapolis MN USA
2. Institute of Physics of the Earth Moscow Russia
3. Department of Climate and Space Sciences and Engineering University of Michigan Ann Arbor MI USA
4. Bradley Department of Electrical and Computer Engineering Virginia Polytechnic Institute and State University Blacksburg VA USA
5. Space Science Institute Boulder CO USA
6. Department of Physics Umeå University Umeå Sweden
7. DTU Space Kongens Lyngby Denmark
8. Natural Resources Canada Ottawa Ontario Canada
9. Department of Physics New Jersey Institute of Technology Newark NJ USA
10. British Antarctic Survey Cambridge UK