(Proposal ID) S17A-028

(PI) Kasaba, Yasumasa

(Proposal Title)
MIR studies of Jupiter simultaneous with key observations by the Juno orbiter

(Abstract)
NASA's Juno mission, having begun a series of orbits around Jupiter, is about 
to transform our understanding of Jovian climatology and electromagnetic 
environment. Our proposal enhances its results by providing COMICS observations
in the mid-IR, a spectral range not covered by Juno.  We request two sets of 
sequential half (bright-time) nights near 8 February and 8 March, and two 
sequential full nights near 4 April, in order to cover Juno's closest 
approaches (perijoves) on orbits 10, 12 and 14. We will perform (1) N-band 
(7.8, 8.7, 10.3 mu m) and Q-band (17.5, 18.65, 20.5, 24.5 mu m) imaging and 
(2) NL (N-band low-resolution) spectroscopy. Tropospheric temperatures and 
the abundances of NH_3 gas and ice in upper troposphere will provide a spatial 
and temporal context and upper boundary conditions for the deep atmospheric 
observations by Juno's Microwave Radiometer (MWR). Stratospheric temperatures 
and abundances of C_2H_2 and C_2H_4, derived from 7.8-mu m CH_4 emission 
imaging and NL spectroscopy, will measure perturbations to the polar 
stratosphere by intense auroral activities measured for the first time by 
Juno's in-situ particle/field instruments.  They will complement and enhance 
the vertical range of Juno's Jovian Infrared Aurora Mapper (JIRAM) and 
Ultraviolet Spectrometer (UVS).