*Michael R Pearlman¹、Carey E Noll²、Erricos C Pavlis³、Toshimichi Otsubo⁴、Jean-Marie Torre⁵、Ulrich Schreiber⁶、Georg Kirchner⁷、Michael Steindorfer⁷ (1.Center for Astrophysics, Cambridge MA, United States、2.NASA Goddard Space Flight Center, Code 61A, Greenbelt MD, United States、3.University of Maryland, Baltimore MD, United States、4.Hitotsubashi University, Tokyo, Japan、5.Observatoire de la Côte d'Azur, Nice, France、6.Technische Universitaet Muenchen, Forschungseinrichtung Satellitengeodaesie Wettzell, Bad Koetzting, Germany、7.Space Research Institute, Austrian Academy of Sciences, Austria)