Michael Kenneth Barker¹, Erwan Mazarico², Gregory A Neumann¹, Xiaoli Sun¹, David E. Smith³, Maria T Zuber⁴ and James W Head III⁵, (1)NASA Goddard Space Flight Center, Greenbelt, MD, United States, (2)NASA Goddard Space Flight Center, Code 698, Greenbelt, MD, United States, (3)Massachusetts Institute of Technology, Cambridge, United States, (4)Massachusetts Inst Tech, Cambridge, MA, United States, (5)Brown University, Providence, RI, United States