structure, and temperature profiles; monitor hot spots on Io. Photopolarimeter/radiometer J. E. Hansen, NASA Measure temperature Goddard profiles and energy balance of Jupiter’s atmosphere; measure Jupiter’s cloud characteristics and composition. Magnetometer M. G. Kivelson, UC Measure magnetic Los Angeles fields and the ways they change near Jupiter and its satellites; measure variations caused by the satellites interacting with Jupiter’s field. Plasma particles L. A. Frank, U. Iowa Provide information on low-energy particles and clouds of ionized gas in the magnetosphere. Energetic particles D. J. Williams, NOAA Measure composition, Space Environment distribution, and Lab energy spectra of high-energy particles trapped in Jupiter’s magnetosphere. Plasma waves D. A. Gurnett, U. Iowa Investigate waves generated inside Jupiter’s magnetosphere and waves radiated by possible lightning discharges in the atmosphere. Dust detection E.