1. UVIS Goals for CSM
R. West

2. Solar and Stellar Occultations
Occultations provide N2 density profiles, compositional information on some hydrocarbons and haze structure in the region km altitude (in the ‘ignorosphere’ between 400 and 900 km UVIS provides the only information
Detailed vertical profiles but point locations in lat, lon.
EUV (solar) for N2; FUV (star occs) for hydrocarbons and haze
Advocacy for VIMS solar occs – hydrocarbons, CO, and haze down to the surface

3. Criteria
Need a distribution in latitude, with attention to high latitudes where the winter polar vortex is expected to be present in the south
Need time coverage to assess seasonal and solar variations
Need approximately radial occs
For stellar occs, slower is better

4. Stellar Occ Opportunities

5. Solar Occ Opportunities

6. Specifics ‘Penciled-in’ opportunities
T78 Low/mid latitude, early opportunity, CIRS and CAPS get most of the time
T103 High latitude in both hemispheres, good stellar occ
T116 High priority stellar occs, and high priority solar occs for VIMS
T118 joint with INMS
Star occs outside of +- 2 hr. on T101, 105, 116