[en] Cassini's Ultraviolet Imaging Spectrograph (UVIS) has completed three years of study of Saturn's atmosphere and auroras. Two long slit spectral channels are used to obtain EUV data from 56.3-118.2 nm and FUV data from 111.5-191.3 nm. 64 spatial pixels along each slit are combined with slit motion to construct spectral images of Saturn. Auroral emissions are seen from electron-excited molecular and atomic hydrogen. In 2007 UVIS obtained data with the spacecraft well out of Saturn's ring plane, permitting us to create images, spectra, and at times movies. We will present an auroral movie from 2007-145 that has been processed to remove flat-fielding artifacts and deconvolved to remove scattering along the slit. The movie shows near co- rotation of N polar auroral features with the planet's rotation. An auroral oval is present. The oval appears doubled on the midnight side. Other images from this year show emissions inside the auroral oval. We will discuss these images and their spectra. Additional images and movies are planned in coming months.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Pryor, W. R.; Central Arizona College, 8470 N. Overfield Rd., Coolidge, AZ 85228, United States
West, R.; Jet Propulsion Laboratory, 4800 Oak Grove Dr., Pasadena, CA 91109, United States
Stewart, I.; LASP/University of Colorado, 1234 Innovation Dr., Boulder, CO 80303, United States
Esposito, L.; LASP/University of Colorado, 1234 Innovation Dr., Boulder, CO 80303, United States
Jouchoux, A.; LASP/University of Colorado, 1234 Innovation Dr., Boulder, CO 80303, United States
McClintock, W.; LASP/University of Colorado, 1234 Innovation Dr., Boulder, CO 80303, United States
Colwell, J.; LASP/University of Colorado, 1234 Innovation Dr., Boulder, CO 80303, United States
Larsen, K.; LASP/University of Colorado, 1234 Innovation Dr., Boulder, CO 80303, United States
Holsclaw, G.; LASP/University of Colorado, 1234 Innovation Dr., Boulder, CO 80303, United States
Shemansky, D.; Space Environment Technologies, 320 N Halstead St Suite 110, Pasadena, CA 91107, United States
Ajello, J.; Jet Propulsion Laboratory, 4800 Oak Grove Dr., Pasadena, CA 91109, United States
Hansen, C.; Jet Propulsion Laboratory, 4800 Oak Grove Dr., Pasadena, CA 91109, United States
Clarke, J.; Boston University, 725 Commonwealth Ave., Boston, MA 02215, United States
Gustin, Jacques ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP)
Grodent, Denis ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP)
Gérard, Jean-Claude ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP)
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