Jupiter; ions from satellites. Plasma waves F. L. Scarf, TRW Measurement of plasma electron densities; wave-particle interactions; low-frequency wave emissions. Low energy charged S. M. Krimigis, Johns Measurement of the particles Hopkins U. distribution, composition, and flow of energetic ions and electrons; satellite-energetic particle interactions. Cosmic ray particles R. E. Vogt, Caltech Measurement of the distribution, composition, and flow of high energy trapped nuclei; energetic electron spectra. Radio science V. R. Eshleman, Measurement of atmospheric Stanford U. and ionospheric structure, constituents, and dynamics; satellite masses. Unlike other Voyager instruments, the imaging system is not the result of a competition among proposals submitted by groups of scientists. NASA assigned the development of the cameras directly to JPL, to be integrated from the beginning with the design of the Voyager spacecraft and its subsystems. The members of the Voyager Imaging Science Team were selected, as individuals, on the basis of the scientific studies they proposed to carry out. Initially, ten members of the Imaging Science Team were selected, but by the time of the Jupiter encounters, the team had been expanded to 22 scientists. [Illustration: Bradford A. Smith, imaging science Team Leader] The Team Leader is Bradford A. Smith, a professor in the Department of Planetary Science at the University of Arizona. Smith was involved in imaging science on several previous missions, including Mariners 6 and 7 and Viking. He was also active in ground-based photography of Jupiter at both New Mexico State University and University of Arizona, and he is a member of the team developing a planetary camera for the Space Telescope, scheduled for operation in Earth orbit in the mid-1980s.