Waite J Hunter, Niemann Hasso, Yelle Roger V, Kasprzak Wayne T, Cravens Thomas E, Luhmann Janet G, McNutt Ralph L, Ip Wing-Huen, Gell David, De La Haye Virginie, Müller-Wordag Ingo, Magee Brian, Borggren Nathan, Ledvina Steve, Fletcher Greg, Walter Erin, Miller Ryan, Scherer Stefan, Thorpe Rob, Xu Jing, Block Bruce, Arnett Ken
Department of Atmospheric, Oceanic, and Space Sciences, University of Michigan, Ann Arbor, MI 48109-2143, USA.
Science. 2005 May 13;308(5724):982-6. doi: 10.1126/science.1110652.
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.
卡西尼离子中性质量谱仪（INMS）首次对土卫六高层大气中的分子氮、甲烷、分子氢、氩以及大量稳定的碳腈化合物的中性密度进行了原位成分测量。INMS原位质谱分析还为高层大气中的大气波提供了证据，并首次对氮、碳和氩的同位素进行了直接测量，这些测量揭示了有关大气演化的有趣线索。自旅行者1号飞掠以来，土卫六高层大气的整体成分和热结构似乎没有太大变化。
