Multi-zonal Parametric Model of the Jovian Synchrotron Radiation Belt Updated from the Juno Mission Observations

Junos remote-sensing scientific instrument, the Microwave Radiometer (MWR), measures both thermal and non- thermal synchrotron radio emissions from the Jovian atmosphere and magnetosphere. Included in the raw data are contributions from the cosmic microwave background, galactic radio emission, synchrotron radiation and planetary radiation. The separation of radiation from the atmosphere from the non-atmospheric contributions is a necessary step in the retrieval of atmospheric composition and physical values atmospheric structure. Other scientific instruments on the spacecraft measure complementary data including properties of 1) Jupiter's magnetic field and 2) charged particles in the magnetosphere. These data provide important additions which assist in the modeling of the non-thermal emission from the magnetosphere. The ad hoc multi-parameter, multi-zonal model of Levin et al. [1] for synchrotron emission has been updated based on a subset of the MWR in-situ data. The model reported here employs an empirical electron-energy distribution, which originally had been adjusted exclusively from Very Large Array (VLA) observations made prior to the Juno mission. The approaches considered and challenges confronted are discussed in this presentation. The model will be updated frequently as additional data from the MWR and magnetometer and particle instruments are included in the model.