1. German Aerospace Center (DLR) Berlin Germany
2. Colorado School of Mines Golden CO USA
3. Royal Observatory of Belgium Brussels Belgium
4. Department of Geosciences Stony Brook University Stony Brook NY USA
5. Physical Science and Engineering Division King Abdullah University of Science and Technology Thuwal Saudi Arabia
6. Institute of Geophysics ETH Zurich Zurich Switzerland
7. Université Côte d'Azur Observatoire de la Côte d'Azur CNRS Laboratoire Lagrange Nice France
8. International Space Science Institute (ISSI) Bern Switzerland