Prof. Fritz K. Brunner/Department of Engineering Geodesy Attie Combrinck/Hartebeesthoek Radio Astronomy Obs. Peter J. Dunn/Sigma Space Richard J. Eanes/U. of Texas, Center for Space Research Yury Galkin/Moscow State Forestry University Dr. Ramesh Govind/Geoscience Australia Ruediger Haas/Onsala Space Observatory Dr. Thomas A. Herring/Mass. Institute of Technology Virgilio Brito Mendes/Dept. de Matematica, Univ. de Lisboa Ron Noomen/Delft University of Technology Toshimichi Otsubo/Hitotsubashi University Dr. Erricos C. Pavlis/GEST/UMBC Stefan Riepl/BKG, Fundamentalstation Wettzell Dr. J. M. Rueger/Univ. of New South Wales Prof. Haojian Yan/Shanghai Astronomical Observatory