1. Department of Geology; Colgate University; Hamilton NY USA
2. Institute for Geophysics, Jackson School of Geosciences; University of Texas at Austin; Austin TX USA
3. NASA Marshall Space Flight Center; Huntsville AL USA
4. Department of Astronomy; Mount Holyoke College; South Hadley MA USA
5. Department of Engineering; Harvey Mudd College; Claremont CA USA
6. Earth and Planetary Sciences; University of California; Santa Cruz CA USA