1. Department of Earth and Planetary Sciences Weizmann Institute of Science Rehovot Israel
2. School of Physics and Astronomy University of Leicester Leicester UK
3. California Institute of Technology Pasadena CA USA
4. Department of Climate and Space Sciences and Engineering University of Michigan Ann Arbor MI USA
5. Jet Propulsion Laboratory California Institute of Technology Pasadena CA USA
6. Observatoire de la Cote d'Azur Nice France
7. Southwest Research Institute San Antonio TX USA