16675

In September 2021 comma the highly successful NASA Juno spacecraft will begin its Extended Mission (EM). During the EM comma Juno will cross the equatorial region inside of Ganymede.s orbit providing an opportunity to obtain HST auroral images simultaneously with high-resolution in situ observations in the crucial inner equatorial region of Jupiter.s magnetosphere comma where the key dynamics that drive and shape the magnetosphere originate. The STIS-FUV imaging observations proposed here over Cycles 29-31 will answer a large number of outstanding scientific questions comma includingdoublePoint * Do magnetosphere-ionosphere coupling currents drive Jupiter.s main auroral emissionquestionMark * What radial forces govern the structure of Jupiter.s magnetospherequestionMark * What is the nature of the interaction between Jupiter and its satellitesquestionMark * How do Jovian plasma populations relate to low latitude auroral emissionsquestionMark * How does magnetospheric wave activity influence Jupiter.s magnetospherequestionMark * What processes give rise to pulsating high-latitude emissionsquestionMark This program responds to the UV initiative and is only possible during the Juno EM. These observations cannot be made by Juno UVS and HST is the only observatory capable of making these FUV observations comma which will yield high-impact results comma and complement and extend the goals of the NASA Juno mission.