From: IN%"" 12-SEP-1997 22:54:13.44 Subj: Draft GEM UVS AWG summary Date: Fri, 12 Sep 1997 15:54:19 -0700 From: Subject: Draft GEM UVS AWG summary To: Cc:,,,,,, GEM UVS AWG science objectives are covered by four general areas. In the AWG feature campaigns to study the role and abundance of water in Jupiter's atmosphere, the UVS will observe stratospheric aerosols along with their dynamic processes by taking data outside 15 Rj following the SSI observations. The UVS will also observe northern and southern aurora in Lyman-alpha and H2 emissions. We will attempt to capture the Io fluxtube footprint (IFT) and any fluxtube that maps from Europa to Jupiter in order to understand long-term magnetosphere and Jovian upper atmosphere interaction. A third area of scientific interest will be to observe brightside hydrocarbon emissions to develop a statistically significant acetylene and ammonia spectrum for several latitudes. This study will help our understanding of minor species chemistry related to dynamics in Jupiter's stratosphere and upper troposphere. Finally, the UVS will observe equatorial Lyman-alpha on Jupiter's darkside to determine if there are long-term changes as a function of System III longitude from charged particle impact upon thermospheric hydrogen. Without the effect of sunlight, H emission variations are a function of magnetospheric plasma interaction and dynamical mixing from lower layers.