Latitudinal and Radial Dependence of Plasma Sheet Ion Properties at Jupiter: Juno JADE-I Observations

The plasma sheet in Jupiter's magnetosphere is composed of multiple ion species originating primarily from Io. The plasma sheet ion composition, flow speed, and temperature at various radial distances from the planet were studied with both in-situ (Voyager PLS and LECP, Galileo PLS) and remote sensing (Cassini UVIS) measurements. However, the presence of ions with similar mass per charge (M/Q) (O⁺ and S²⁺) made it difficult to determine some of the key ion properties that define the plasma sheet structure and dynamics. NASA's Juno mission is the first polar orbiting satellite at Jupiter and provides an opportunity to explore both radial and latitudinal structure of the plasma sheet. The Jovian Auroral Distributions Experiment (JADE) on Juno spacecraft is comprised of an ion sensor (JADE-I) and two nearly identical electron sensors (JADE-E). JADE-I measures the energy distribution of 0.01 to 46.2 kilo-electron volts per charge (keV/q) ions over a M/Q range of 1 - 64 amu/q. JADE-I resolves O⁺ and S²⁺ for the first time using instrument response functions derived from calibration data and simulations. In this presentation, we use the JADE-I data and a forward model with convected kappa distributions to investigate the latitudinal and radial dependence of the plasma sheet ion properties.