The magnetospheric imaging instrument (MIMI) is a neutral and charged particle detection system on the Cassini orbiter spacecraft designed to perform both global imaging and in-situ measurements to study the overall configuration and dynamics of Saturn's magnetosphere and its interactions with the solar wind, Saturn's atmosphere, Titan, and the icy satellites. Further, the Jovian magnetosphere and lo torus will be imaged during Jupiter flyby. The Titan exosphere and its cometary interaction with magnetospheric plasmas will be imaged in detail on each flyby. CHEMS (charge-energy-mass-spectrometer) uses electrostatic deflection, TOF, and energy measurement to determine ion energy, charge state, mass, and 3-D anisotropy in the range 3 to 220 keV/e with good (approximately 0.05 sq cm sr) sensitivity. Similarily, measurements in cis-Jovian space include the first detailed charge state determination of logenic ions and several ENA images of that planet's magnetosphere.