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Latitudinal variations of HCN, HC 3N, and C 2N 2 in Titan's stratosphere derived from Cassini CIRS data
Fletcher, L.; Irwin, P. G. J.; Teanby, N. A. +9 more
Mid- and far-infrared spectra from the Composite InfraRed Spectrometer (CIRS) have been used to determine volume mixing ratios of nitriles in Titan's atmosphere. HCN, HC 3N, C 2H 2, and temperature were derived from 2.5 cm -1 spectral resolution mid-IR mapping sequences taken during three flybys, which p…
Jupiter's atmospheric temperatures: From Voyager IRIS to Cassini CIRS
Achterberg, Richard K.; Flasar, F. Michael; Simon-Miller, Amy A. +4 more
Retrievals performed on Cassini Composite Infrared Spectrometer data obtained during the distant Jupiter flyby in 2000/2001 have been used to generate global temperature maps of the planet in the troposphere and stratosphere, but to higher latitudes than were shown previously by Flasar et al. [Flasar, F.M., 39 colleagues, 2004a. Nature 427, 132-13…
Carbon dioxide photoelectron energy peaks at Mars
Coates, A. J.; Kallio, E.; Fedorov, A. +40 more
The ELectron Spectrometer (ELS) from the Analyzer of Space Plasmas and Energetic Atoms (ASPERA-3) flown on the Mars Express spacecraft has an 8% energy resolution, combined with the capability to oversample the martian electron distribution. This makes possible the resolution and identification of electrons generated as a result of the He 304 Å io…
Interaction between eddies and mean flow in Jupiter's atmosphere: Analysis of Cassini imaging data
Ingersoll, Andrew P.; Del Genio, Anthony D.; Vasavada, Ashwin +2 more
Beebe et al. [Beebe, R.F., et al., 1980. Geophys. Res. Lett. 17, 1-4] and Ingersoll et al. [Ingersoll, A.P., et al., 1981. J. Geophys. Res. 86, 8733-8743] used images from Voyagers 1 and 2 to analyze the interaction between zonal winds and eddies in Jupiter's atmosphere. They reported a high positive correlation between Jupiter's eddy momentum flu…
Mass composition of the escaping plasma at Mars
Coates, A. J.; Kallio, E.; Fedorov, A. +44 more
Data from the Ion Mass Analyzer (IMA) sensor of the ASPERA-3 instrument suite on Mars Express have been analyzed to determine the mass composition of the escaping ion species at Mars. We have examined 77 different ion-beam events and we present the results in terms of flux ratios between the following ion species: CO +2/O
Production, ionization and redistribution of O 2 in Saturn's ring atmosphere
Luhmann, J. G.; Tokar, R. L.; Johnson, R. E. +10 more
Molecular oxygen produced by the decomposition of icy surfaces is ubiquitous in Saturn's magnetosphere. A model is described for the toroidal O 2 atmosphere indicated by the detection of O2+ and O + over the main rings. The O 2 ring atmosphere is produced primarily by UV photon-induced decomposition of ice on the s…
The vertical structure of Titan's upper atmosphere from Cassini Ion Neutral Mass Spectrometer measurements
Waite, J. H.; Kasprzak, W. T.; Müller-Wodarg, I. +4 more
Data acquired by the Ion Neutral Mass Spectrometer (INMS) on the Cassini spacecraft during its close encounter with Titan on 26 October 2004 reveal the structure of its upper atmosphere. Altitude profiles of N 2, CH 4, and H 2, inferred from INMS measurements, determine the temperature, vertical mixing rate, and es…
A large cloud outburst at Titan's south pole
Brown, Michael E.; Bouchez, Antonin H.; Roe, Henry G. +1 more
Images of Titan acquired over five nights in October 2004 using the adaptive optics system at the Keck Observatory show dramatic increases in tropospheric cloud activity at the south pole compared with all other images of Titan clouds to date. During this time, Titan's south polar clouds brightened to more than 18 times their typical values. The C…
Structure of the martian wake
Coates, A. J.; Kallio, E.; Fedorov, A. +42 more
We present the first results from the ion mass analyzer IMA of the ASPERA-3 instrument on-board of Mars Express. More than 200 orbits for May 2004-September 2004 time interval have been selected for the statistical study of the distribution of the atmospheric origin ions in the planetary wake. This study shows that the martian magnetotail consists…
Compositional and physical results for Rosetta's new target Comet 67P/Churyumov Gerasimenko from narrowband photometry and imaging
Schleicher, David G.
We present compositional and physical results of Comet 67P/Churyumov-Gerasimenko, the new target of ESA's Rosetta mission. A total of 16 nights of narrowband photometry were obtained at Lowell Observatory during the 1982/83 and 1995/96 apparitions, along with one night of imaging near perihelion in 1996. These data encompass an interval of -61 to …