1. Department of Physical Sciences; Embry-Riddle Aeronautical University; Daytona Beach FL USA
2. NASA Goddard Space Flight Center; Greenbelt MD USA
3. Department of Physics; University of Wisconsin-Madison; Madison WI USA
4. School of Engineering and Applied Sciences; Harvard University; Boston MA USA
5. Adnet Systems Inc.; Greenbelt MD USA
6. Department of Planetary Sciences; University of Arizona; Tucson AZ USA