HR: 0800h
AN: P11C-0129    [Abstracts]
TI: Temperature Structure of Saturn from Spectral Mapping by Cassini CIRS and Joint High-Resolution Subaru COMICS and IRTF MIRSI Mid-Infrared Imaging
AU: * Orton, G
EM: go@orton.jpl.nasa.gov
AF: Jet Propulsion Laboratory California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109 United States
AU: Parrish, P
EM: pdp@scn.jpl.nasa.gov
AF: Jet Propulsion Laboratory California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109 United States
AU: Yanamandra-Fisher, P
EM: padma@scn.jpl.nasa.gov
AF: Jet Propulsion Laboratory California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109 United States
AU: Fletcher, L
EM: fletcher@atm.ox.ac.uk
AF: Clarendon Laboratory Oxford University, Parks Road, Oxford, OX1 3PU United Kingdom
AU: Irwin, P
EM: irwin@atm.ox.ac.uk
AF: Clarendon Laboratory Oxford University, Parks Road, Oxford, OX1 3PU United Kingdom
AU: Fuse, T
EM: tetsu@subaru.naoj.org
AF: Subaru Observatory National Astronomical Observatory of Japan, 650 N. A'ohoku Place, Hilo, HI 96720 United States
AU: Fujiyoshi, T
EM: takuya.fujiyoshi@SubaruTelescope.org
AF: Subaru Observatory National Astronomical Observatory of Japan, 650 N. A'ohoku Place, Hilo, HI 96720 United States
AU: Hagopian, H
EM: thE_hagop@yahoo.com
AF: University of California, Los Angeles, 4732 Boelter Hall, Los Angeles, CA 90095 United States
AU: Laakso, T
EM: laakso@fas.harvard.edu
AF: Harvard College, 60 Garden St., Cambridge, MA 02138 United States
AU: Vogt, M
EM: marissav@mit.edu
AF: Massachusetts Institute of Technology, 77 Massachusetts Ave., Cambridge, MA 02138 United States
AU: Lotoszinski, J
EM: jlotoszi@scn.jpl.nasa.gov
AF: Glendale Community College, 1500 N. Verdugo Rd., Glendale, CA 91208 United States
AU: Hora, J
EM: jhora@cfa.harvard.edu
AF: Harvard/Smithsonian Center for Astrophysics, 60 Garden St., Cambridge, MA 02138 United States
AB: We report on a joint project of Cassini and ground-based support observations of Saturn's temperature field. Several sequences of CIRS spectra were made during 2004-2005 which scanned Saturn's central meridian using its FP1 (long wavelength-) and its FP3 and FP4 (intermediate- and short-wavelength) focal planes for the purpose of determining temperatures between 1 microbar and 400 mbar total pressure at spatial resolutions ranging from 170 to 3800 km (from 0.5 to 11 great-circle degrees). These infrequent observations (2004 Oct 30; 2005 March 10, April 8-9, May 22) were supplemented by a program at the NASA Infrared Telescope Facility of thermal imaging using the MIRSI mid-infrared camera spectrometer with diffraction-limited resolutions of ~3000 km, which provided a time sequence which is particularly valuable for characterizing wave structure and other time-dependent phenomena and for verifying CIRS temperature maps at 10 mbar or between 100 and 400 mbar pressure. We also obtained diffraction-limited resolutions of 1000 km thermal images of Saturn from the Subaru Japanese National Telescope using their COMICS facility mid-infrared camera/spectrometer on 2005 April 30 and May 24, providing spatial resolution commensurate with the Cassini/CIRS, global imaging, the opportunity for center-to-limb studies, and the means to track variability in PH3 and cloud optical thickness in very faint spectral regions. The meridional variability of temperatures is consistent with the seasonal dependence of temperatures documented by two decades of thermal monitoring of Saturn at the IRTF.
DE: 5700 PLANETARY SCIENCES: FLUID PLANETS
DE: 5704 Atmospheres (0343, 1060)
DE: 5739 Meteorology (3346)
DE: 5754 Polar regions
DE: 5794 Instruments and techniques
SC: Planetary Sciences [P]
MN: Fall Meeting 2005