Queen Mary University of London, London, United Kingdom
University of Michigan, Ann Arbor, MI, United States
Natl Geophysical Data Ctr, Boulder, CO, United States
Department of Earth, Planetary, and Space Sciences and Institute of Geophysics and Planetary Physics, University of California, Los Angeles, Los Angeles, CA, United States
Space Sciences Laboratory, University of California Berkeley, Berkeley, CA, United States
National Institute of Aerospace, Hampton, VA, United States