1. Department of Earth, Planetary, and Space Sciences University of California Los Angeles Los Angeles CA USA
2. Jet Propulsion Laboratory California Institute of Technology Pasadena CA USA
3. Institut Supérieur de l’Aéronautique et de l’Espace Toulouse France
4. Institut de Physique du Globe de Paris Paris France
5. ETH Zürich Zürich Switzerland
6. School of Earth Sciences University of Bristol Bristol UK