1. Department of Earth, Planetary, and Space Sciences University of California Los Angeles CA USA
2. CNRS Institut de physique du globe de Paris Université Paris Cité Paris France
3. Department of Geosciences Stony Brook University Stony Brook NY USA
4. Laboratoire Lagrange Observatoire de la Côte d’Azur CNRS Université Côte d’Azur Nice France
5. Jet Propulsion Laboratory California Institute of Technology Pasadena CA USA
6. Bensberg Observatory University of Cologne Bergisch Gladbach Germany