1. Department of Earth and Atmospheric Sciences; University of Houston; Houston Texas USA
2. Department of Physics; University of Houston; Houston Texas USA
3. Department of Chemistry; University of Houston; Houston Texas USA
4. Department of Earth and Planetary Sciences; The Johns Hopkins University; Baltimore Maryland USA
5. Jet Propulsion Laboratory; California Institute of Technology; Pasadena California USA
6. Division of Geological and Planetary Sciences; Caltech; Pasadena California USA
7. Space Science and Engineering Center; University of Wisconsin-Madison; Madison Wisconsin USA
8. NASA Goddard Space Flight Center; Greenbelt Maryland USA