Jovian Auroral Ionosphere-Thermosphere Model (J-AITM): Part 2. Benchmarks of the Ion Velocity Model (IVM) and the Electric Field Model (EFM)

As part of the Jupiter Auroral Ionosphere-Thermosphere Model (J-AITM) construction in support of the Juno mission, we present benchmarks of the Electric Field Model (EFM) and the Ion Velocity Model (IVM). IVM uses the published results from Krupp et al., 2001, to constrain estimated velocities, and it is found that a modified Gaussian distribution gives a first-order approximation to the velocity flow profile. EFM calculates the magnetospheric electric fields using IVM and a magnetic field model, and then assumes magnetic flux conservation to map the electric fields into the ionosphere. These ionospheric electric fields are then used to estimate ionospheric drift velocities.