IRTF Data Archive Program Information

# # Program information file # PROGRAM_ID 2022A054 PROGRAM_TITLE Saturn since Cassini: seasonal progression with IRTF and JWST PROGRAM_INV1 James Blake PROGRAM_INV2 Leigh Fletcher PROGRAM_INV3 Thomas Greathouse PROGRAM_INV4 Glenn Orton PROGRAM_INV5 Jack Harkett PROGRAM_SCICAT major planets / satellites PROGRAM_ABSTRACT_BEG The forthcoming James Webb Space Telescope [JWST] mission offers an opportunity for exciting new perspectives on Saturn's atmospheric circulation and meteorology. IRTF/TEXES supporting observations during semester 2022A will be crucial for spatial and temporal context for the as yet untested JWST facility. We propose high spectral resolution observations of Saturn's northern summer hemisphere using the TEXES instrument at the IRTF. Whilst supporting guaranteed JWST observations, these will also be used to track the continued seasonal evolution of Saturn's atmospheric temperatures, winds and circulation two years after the end of the Cassini mission. We will examine the 2D [meridional and vertical] temperature and wind structure associated with the continued development and growth of the seasonal north polar vortex; the propagation of the equatorial stratospheric oscillation [QPO]; the amplitude and latitudes of thermal wave activity. PROGRAM_ABSTRACT_END