1. Department of Astronomy, University of Texas at Austin, Austin, Texas.
2. Harvard-Smithsonian Center for Astrophysics, Cambridge, Massachusetts.
3. California Institute of Technology/Jet Propulsion Laboratory, Pasadena, California.
4. European Space Agency, ESTEC, Noordwijk, The Netherlands.
5. Institut d'Estudis Espacials de Catalunya, Barcelona, Spain.
6. Instituto de Ciencias del Espacio, Barcelona, Spain.
7. Polar Geophysical Institute, Russian Academy of Sciences, Murmansk, Russian Federation.
8. Institute für Planetenforschung, Extrasolare Planeten und Atmospharen, Berlin, Germany.
9. Institute for Physics, University of Graz;, Graz, Austria.
10. Centre de Recherche en Astrophysique de Lyon; France.
11. École Normale Supérieure, Lyon, France.
12. Space Research Institute, Austrian Academy of Sciences, Graz, Austria.
13. Departemento de Física Teórica, C-XI, Facultad de Ciencias, Universidad Autónoma de Madrid, Madrid, Spain.
14. Department of Geosciences, Pennsylvania State University, State College, Pennsylvania.