Future observations in the IR of Jupiter Auroras during the Juno mission

Details Future observations in the IR of Jupiter Auroras during the Juno mission Future observations in the IR of Jupiter Auroras during the Juno mission

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufm.p11c1290a&link_type=abstract

American Geophysical Union, Fall Meeting 2008, abstract #P11C-1290

Other

5706 Aurorae, 5719 Interactions With Particles And Fields, 5794 Instruments And Techniques, 6220 Jupiter

Scientific paper

The Juno mission to Jupiter has been planned for reaching Jupiter in October 2016. Juno's orbits have been designed for being polar. This will be a great chance for the Italian Jupiter InfraRed Auroral Mapper (JIRAM) to observe and map Jupiter auroras on the both north and south pole. JIRAM is an image spectrometer sensitive in the IR range 2-5 micron and it is provided with two focal planes: one for taking images on the L- band where the aurora IR light is emitted and the second one for making spectra with a resolution of 9 nm of part of the image. JIRAM will operate in IR wavelength and will be able to observe the H3+ emission at 3.4- 3.6 micron on the dark underlying atmosphere due to the strong absorption of methane at those wavelengths. Other mission has observed Jupiter auroras but never at such small distance and with this spectral resolution. NIMS on Galileo was the first imaging spectrometer able to observe auroras, but its spectral resolution was about three times less than JIRAM and the instrument was not able to get a large number of quality observations. Another imager spectrometer which observed Jupiter was VIMS on Cassini during its Jupiter fly-by when the spacecraft was flying at a distance of about 1 million of kilometers from the planet for a short observation at very low spatial and lower spectral resolutions. In the future, Juno will permit JIRAM to observe auroras from an unique point of view thanks to its polar orbiting and for flying so close to the planet. Juno will fly over the poles at an altitude of 1 planet radius. IR observations from JIRAM will be complemented by another instrument (UVS) observing the ultraviolet emission of the auroras.

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