CO on Titan: More Evidence for a Well-Mixed Vertical Profile
  We report new interferometric observations of the CO (2-1) rotational transition on Titan. We find that the spectrum is best fit by a uniform profile of 52 ppm, with estimated errors of 6 ppm (40 to 200 km) and 12 ppm (200 to 300 km). 
M.A. Gurwell (Harvard-Smithsonian Center for Astrophysics) and D.O.   Muhleman (Division of Geological and Planetary Science...