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The Cassini Ultraviolet Imaging Spectrograph Investigation |
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| Authors: | Larry W Esposito Charles A Barth Joshua E Colwell George M Lawrence William E McClintock A Ian F Stewart H Uwe Keller Axel Korth Hans Lauche Michel C Festou Arthur L Lane Candice J Hansen Justin N Maki Robert A West Herbert Jahn Ralf Reulke Kerstin Warlich Donald E Shemansky Yuk L Yung |
| Institution: | (1) University of Colorado, Laboratory for Atmospheric and Space Physics, 1234 Innovation Drive, Boulder, CO, 80303, U.S.A.;(2) Max-Planck-Institut für Aeronomie, Max-Planck-Strasse 2, 37191 Katlenburg-Lindau, Germany;(3) Observatoire Midi-Pyr’en’ees, 14 avenue E. Belin, F31400 Toulouse, France;(4) Jet Propulsion Laboratory, 4800 Oak Grove Drive, Pasadena, CA, 91109, U.S.A.;(5) Deutsches Zentrum für Luft und Raumfahrt, Institut für Weltraumsensorik und Planetenerkundung, Rutherford Strasse 2, 12489 Berlin, Germany;(6) University of Southern California, Department of Aerospace Engineering, 854 W. 36th Place, Los Angeles, CA, 90089, U.S.A.;(7) California Institute of Technology, Division of Geological and Planetary Sciences, MS 150-21, Pasadena, CA, 91125, U.S.A. |
| Abstract: | The Cassini Ultraviolet Imaging Spectrograph (UVIS) is part of the remote sensing payload of the Cassini orbiter spacecraft. UVIS has two spectrographic channels that provide images and spectra covering the ranges from 56 to 118 nm and 110 to 190 nm. A third optical path with a solar blind CsI photocathode is used for high signal-to-noise-ratio stellar occultations by rings and atmospheres. A separate Hydrogen Deuterium Absorption Cell measures the relative abundance of deuterium and hydrogen from their Lyman-α emission. The UVIS science objectives include investigation of the chemistry, aerosols, clouds, and energy balance of the Titan and Saturn atmospheres; neutrals in the Saturn magnetosphere; the deuterium-to-hydrogen (D/H) ratio for Titan and Saturn; icy satellite surface properties; and the structure and evolution of Saturn’s rings.This revised version was published online in July 2005 with a corrected cover date. |
| Keywords: | Cassini rings Saturn spectroscopy on Titan and on Saturn |
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