Jupiter Radio Emissions From Juno and Support Observations

Juno has provided the first opportunities to directly sample sources of Jovian auroral radio emissions. In addition to measuring the radio emissions, the supporting plasma observations from the Juno plasma instrument, JADE, have enabled the identification of free energy sources including loss cones, electron conics, and shell distributions. Although studies at Earth have shown these to be unstable to the cyclotron maser instability, they had only been conjectured for Jovian emissions. The Juno observations have also shown the distribution of radio source locations, such as on the equatorward edge of the auroral oval. Juno’s polar orbit has also advanced our knowledge of the beaming characteristics of the emissions. Earth-based observations have also been used to supplement our understanding of the beaming properties.