Search Publications
Condensation in Titan's atmosphere at the Huygens landing site
Yelle, R. V.; Lavvas, P.; Griffith, C. A.
We present a self-consistent description of Titan's aerosols-clouds-gases system and compare our results with the optical properties retrieved from measurements made by the Descent Imager/Spectral Radiometer (DISR) experiment on the Huygens probe (Tomasko, M.G. et al. [2008]. Planet. Space Sci. 56, 669-707). Our calculations include the condensati…
The near-IR spectrum of Titan modeled with an improved methane line list
Bailey, Jeremy; Meadows, V. S.; Ahlsved, Linda
We have obtained spatially resolved spectra of Titan in the near-infrared J, H and K bands at a resolving power of ∼5000 using the near-infrared integral field spectrometer (NIFS) on the Gemini North 8 m telescope. Using recent data from the Cassini/Huygens mission on the atmospheric composition and surface and aerosol properties, we develop a mul…
Simulating the one-dimensional structure of Titan's upper atmosphere: 3. Mechanisms determining methane escape
Bar-Nun, Akiva; Bougher, Stephen W.; Mandt, Kathleen E. +11 more
This investigation extends the work presented by Bell et al. (2010a, 2010b). Using the one-dimensional (1-D) configuration of the Titan Global Ionosphere-Thermosphere Model (T-GITM), we quantify the relative importance of the different dynamical and chemical mechanisms that determine the CH4 escape rates calculated by T-GITM. Moreover, …
Morphology and variability of the Titan ringlet and Huygens ringlet edges
Colwell, Joshua E.; Esposito, Larry W.; Jerousek, Richard G.
We present a forward modeling approach for determining, in part, the ring particle spatial distribution in the vicinity of sharp ring or ringlet edges. Synthetic edge occultation profiles are computed based on a two-parameter particle spatial distribution model. One parameter, h, characterizes the vertical extent of the ring and the other, δ, char…
Insolation in Titan's troposphere
Lunine, Jonathan I.; Lora, Juan M.; Goodman, Paul J. +1 more
Seasonality in Titan's troposphere is driven by latitudinally varying insolation. We show that the latitudinal distributions of insolation in the troposphere and at the surface, based on Huygens DISR measurements, can be approximated analytically with nonzero extinction optical depths τ, and are not equivalent to that at the top of the atmosphere …
Titan’s new pole: Implications for the Huygens entry and descent trajectory and landing coordinates
Lebreton, Jean-Pierre; Atkinson, David H.; Kazeminejad, Bobby
The European Space Agency's Huygens probe separated from the NASA Cassini spacecraft on 25 December 2004, after having been attached for a 7-year interplanetary journey and three orbits around Saturn. The probe reached the predefined NASA/ESA interface point on 14 January 2005 at 09:05:52.523 (UTC). It performed a successful entry and descent sequ…
Comment on “An analysis of VLF electric field spectra measured in Titan's atmosphere by the Huygens probe” by J. A. Morente et al.
Berthelier, Jean-Jacques; Béghin, Christian; Hamelin, Michel +4 more
Abstract Available from http://www.agu.org
Reply to comment by R. Grard et al. on “An analysis of VLF electric field spectra measured in Titan's atmosphere by the Huygens probe”
Morente, Juan A.; Portí, Jorge A.; Navarro, Enrique A. +1 more
Abstract Available from http://www.agu.org