Mark Simons, California Institute of Technology, United States; David Bekaert, Jet Propulsion Laboratory, United States; Adrian Borsa, University of California San Diego, United States; Andrea Donnellan, Eric Fielding, Cathleen Jones, Jet Propulsion Laboratory, United States; Rowena Lohman, Cornell University, United States; Zhong Lu, Southern Methodist University, United States; Franz Meyer, University of Alaska, United States; Susan Owen, Paul Rosen, Jet Propulsion Laboratory, United States; Howard Zebker, Stanford, United States