Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991plas.rept...71k&link_type=abstract
In NASA, Washington, Reports of Planetary Astronomy, 1991 p 71-72 (SEE N92-12792 03-89)
Astronomy and Astrophysics
Astronomy
Astronomical Spectroscopy, Atmospheric Chemistry, Atmospheric Circulation, Infrared Spectroscopy, Jupiter Atmosphere, Saturn Atmosphere, Titan, Variability, Atmospheric Composition, Atmospheric Stratification, Infrared Astronomy, Infrared Radiation, Infrared Spectrometers, Jupiter (Planet), Low Concentrations, Mass Spectrometers, Saturn (Planet), Spectral Bands, Transparence
Scientific paper
Infrared spectroscopy provides unique insights into the chemistry and dynamics of the atmospheres of Jupiter and Saturn, and of the enigmatic satellite of Saturn, Titan. The 5 micron spectral region of these objects is transparent to deep levels, and is therefore particularly useful for the identification of molecules that are present at very low (parts per billion) concentrations. In Titan, 5 micron observations probe atmospheric layers at or near the surface. Ground-based spectroscopy complements Voyager, Galileo, and Cassini measurements. The spectroscopy is sensitive to lower mixing ratios for selected molecules, while the on-board mass and infrared spectrometers probe molecules and levels that are inaccessible form the ground. The observations also provide time-based data for preparation of the upcoming missions.
Knacke Roger
Noll Keith S.
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