1. Haystack Observatory Massachusetts Institute of Technology Westford MA USA
2. Center for Space Physics Boston University Boston MA USA
3. Applied Physics Laboratory Johns Hopkins University Laurel MD USA
4. Department of Physics University of Texas at Arlington Arlington TX USA
5. Thayer School of Engineering Dartmouth College Hanover NH USA
6. Computational Physics, Inc North Chelmsford MA USA
7. Department of Physics and Technology The Arctic University of Norway Tromsø Norway