1. Solar System Exploration Division, NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA.
2. Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
3. Institut de Physique du Globe de Paris, Sorbonne Paris Cité, Université Paris Diderot, CNRS, Paris 75013, France.
4. Department of Earth, Environmental and Planetary Sciences, Brown University, Providence, RI 02912, USA.
5. Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY 10964, USA.
6. Department of Terrestrial Magnetism, Carnegie Institution of Washington, Washington, DC 20015, USA.
7. Center for Research and Exploration in Space Science and Technology, University of Maryland, Baltimore County, Baltimore, MD 21250, USA.
8. Department of Earth, Atmospheric, and Planetary Sciences, Purdue University, West Lafayette, IN 47907, USA.
9. Planetary Science Directorate, Southwest Research Institute, Boulder, CO 80302, USA.
10. Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109–8099, USA.
11. Department of Geophysics and Center for Space Resources, Colorado School of Mines, Golden, CO 80401, USA.
12. Department of Earth and Planetary Sciences, University of California, Santa Cruz, Santa Cruz, CA 95064, USA.
13. Lunar and Planetary Institute, Houston, TX 77058, USA.