Radiation Environment Analysis of Jupiter from Juno/JADE-E, UVS and JEDI-E Penetrating Radiation Datasets

We present data analysis and modeling results of Jupiter's radiation environment that are primarily guided by Juno/JADE-E ambient background datasets. Each of the JADE-E sensors has 16 anode pixels to measure electrons with energies of ~0.001 up to ~100 keV and one anode pixel to measure the ambient background. The rate measured on the background anode corresponds to penetrating radiation produced by magnetospheric electrons with energies > ~ 4-5 MeV. Radiation background in Juno/UVS instrument informs on > ~ 10 MeV electrons while Juno/JEDI-E SSD witness detectors are responsive to > ~ 0.8-1 MeV electrons. With a time resolution of a minute or much shorter, data from Juno/JADE-E, UVS and JEDI-E from the first half of the Juno mission provide a good time-space sampling of ultra-relativistic electron distributions over a large region of the magnetosphere of Jupiter. In this work, radiation background measured by Juno is first used to constrain an empirical model of Jupiter's radiation environment, which is developed for M-shells of 1 up to 50 and energies of 1 up to 100 MeV. Our results are compared to Juno's high-latitude in-situ data but also to electron belt models that were developed using in-situ data from past missions (Pioneer, Voyager, Galileo orbiter) and ground-based observations. We will discuss how Juno's penetrating radiation datasets and an improved model of Jupiter's radiation environment help the analysis and modeling of Juno/MWR's observations of non-thermal polarized emissions generated at short M-shells by the inner electron belt but also along field lines connected to the polar regions.