A. Lyle Broadfoot, Kitt Peak National Observatory, Principal Investigator J. L. Bertaux, Service d’Aeronomie du CNRS, France J. Blamont, Service d’Aeronomie du CNRS, France T. M. Donahue, University of Michigan R. M. Goody, Harvard University A. Dalgarno, Harvard College Observatory Michael B. McElroy, Harvard University J. C. McConnell, York University, Canada H. W. Moos, Johns Hopkins University M. J. S. Belton, Kitt Peak National Observatory D. F. Strobel, Naval Research Laboratory Sushil Atreya, University of Michigan William R. Sandel, University of Southern California Donald Shemanski, University of Southern California Photopolarimetry Charles W. Hord, University of Colorado, Acting Principal Investigator D. L. Coffeen, Goddard Institute for Space Studies J. E. Hansen, Goddard Institute for Space Studies K. Pang, Science Applications Inc. Planetary Radio Astronomy James W. Warwick, University of Colorado, Principal Investigator Anthony Riddle, Radiophysics, Inc. Jeffrey Pearce, Radiophysics, Inc. J. K. Alexander, Goddard Space Flight Center A. Boischot, Observatoire de Paris, France W. E. Brown, Jet Propulsion Laboratory T. D. Carr, University of Florida Samuel Gulkis, Jet Propulsion Laboratory F. T. Haddock, University of Michigan C. C. Harvey, Observatoire de Paris, France Y. LeBlanc, Observatoire de Paris, France R. G. Peltzer, University of Colorado R. J. Phillips, Jet Propulsion Laboratory D. H. Staelin, Massachusetts Institute of Technology Magnetic Fields Norman F. Ness, Goddard Space Flight Center, Principal Investigator Mario H. Acuna, Goddard Space Flight Center K. W. Behannon, Goddard Space Flight Center L. F. Burlaga, Goddard Space Flight Center R. P. Lepping, Goddard Space Flight Center F. M. Neubauer, Technische Universitat, F.R.G. Plasma Science Herbert S. Bridge, Massachusetts Institute of Technology, Principal Investigator J. W. Belcher, Massachusetts Institute of Technology J. H. Binsack, Massachusetts Institute of Technology A. J. Lazarus, Massachusetts Institute of Technology S. Olbert, Massachusetts Institute of Technology V. M. Vasyliunas, Max Planck Institute, F.R.G. L. F. Burlaga, Goddard Space Flight Center R. E. Hartle, Goddard Space Flight Center K. W. Ogilvie, Goddard Space Flight Center G. L. Siscoe, University of California, Los Angeles A. J. Hundhausen, High Altitude Observatory Low-Energy Charged Particles S. M. Krimigis, Johns Hopkins University, Principal Investigator T. P. Armstrong, University of Kansas W. I. Axford, Max Planck Institute, F.R.G. C. O. Bostrom, Johns Hopkins University C. Y. Fan, University of Arizona G. Gloeckler, University of Maryland L. J. Lanzerotti, Bell Telephone Laboratories