IRTF Data Archive Program Information

# # Program information file # PROGRAM_ID 2022A014 PROGRAM_TITLE Studying Io's Seasonal Atmosphere and Investigating Volcanic Emissions PROGRAM_INV1 Constantine Tsang PROGRAM_INV2 John Spencer PROGRAM_INV3 PROGRAM_INV4 PROGRAM_INV5 PROGRAM_SCICAT major planets / satellites PROGRAM_ABSTRACT_BEG Io's atmosphere is dominated by SO2, which has strong bands in the mid-IR. Previous works have shown over a Jupiter year an apparent seasonal response of Io's atmosphere to orbital eccentricity. We will add to data on the long term global, spatially inhomogeneous atmosphere at 19 um using TEXES to determine the mechanisms of support. Observations over a second Jupiter year will confirm or refute these conclusions. In addition, we will focus more on the sub-Jupiter hemisphere to increase and improve on longitudinal coverage compared to previous studies, as well as investigate correlations of volcanic SO2 and Na. PROGRAM_ABSTRACT_END