Ion neutral mass spectrometer results from the first flyby of Titan.


The Cassini Ion Neutral Mass Spectrometer (INMS) has obtained the first in situ composition measurements of the neutral densities of molecular nitrogen, methane, molecular hydrogen, argon, and a host of stable carbon-nitrile compounds in Titan's upper atmosphere. INMS in situ mass spectrometry has also provided evidence for atmospheric waves in the upper atmosphere and the first direct measurements of isotopes of nitrogen, carbon, and argon, which reveal interesting clues about the evolution of the atmosphere. The bulk composition and thermal structure of the moon's upper atmosphere do not appear to have changed considerably since the Voyager 1 flyby.

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@article{Waite2005IonNM, title={Ion neutral mass spectrometer results from the first flyby of Titan.}, author={J Hunter Waite and Hasso B. Niemann and R Yelle and Wayne T Kasprzak and Thomas E. Cravens and Janet G. Luhmann and Ralph L. McNutt and Wing-Huen Ip and David A. Gell and Virginie De La Haye and Ingo M{\"{u}ller-Wordag and Brian A Magee and Nathan Borggren and Steve Ledvina and Greg Fletcher and Erin P Walter and Ryan Miller and Stefan Scherer and Rob Thorpe and Jing Xu and Bruce Block and Ken Arnett}, journal={Science}, year={2005}, volume={308 5724}, pages={982-6} }