Jon Duane Vandegriff, Johns Hopkins University Applied Physics Laboratory, Laurel, MD, United States, D Aaron Roberts, NASA Goddard SFC, Code 672, Greenbelt, MD, United States, Robert S Weigel, George Mason University, Fairfax, VA, United States, Robert M Candey, NASA Goddard Space Flight Cntr, Greenbelt, MD, United States, Jeremy Faden, Self Employed, Washington, DC, United States and Jack Ireland, ADNET Systems Inc. Greenbelt, Greenbelt, MD, United States