HR: 16:55h
AN: P54A-04 INVITED     [Abstracts]
TI: Energetic Neutral Atom Emission During Cassini's First Orbits at Saturn: Source Strength and Dynamics
AU: * Mitchell, D G
EM: don.mitchell@jhuapl.edu
AF: JHU/APL, MP3 E132 11100 Johns Hopkins Road, Laurel, MD 20723 United States
AU: Krimigis, S M
EM: tom.krimigis@jhuapl.edu
AF: JHU/APL, MP3 E132 11100 Johns Hopkins Road, Laurel, MD 20723 United States
AU: Mauk, B H
EM: barry.mauk@jhuapl.edu
AF: JHU/APL, MP3 E132 11100 Johns Hopkins Road, Laurel, MD 20723 United States
AU: Roelof, E C
EM: ed.roelof@jhuapl.edu
AF: JHU/APL, MP3 E132 11100 Johns Hopkins Road, Laurel, MD 20723 United States
AU: Paranicas, C P
EM: chris.paranicas@jhuapl.edu
AF: JHU/APL, MP3 E132 11100 Johns Hopkins Road, Laurel, MD 20723 United States
AU: Brandt, P C
EM: pontus.brandt@jhuapl.edu
AF: JHU/APL, MP3 E132 11100 Johns Hopkins Road, Laurel, MD 20723 United States
AU: Dandouras, I
EM: Iannis.Dandouras@cesr.fr
AF: Centre d'Etude Spatiale des Rayonnements, BP 4346 Toulouse Cedex 31029, Toulouse, 31029 France
AU: Livi, S
EM: stefano.livi@jhuapl.edu
AF: JHU/APL, MP3 E132 11100 Johns Hopkins Road, Laurel, MD 20723 United States
AU: Hamilton, D C
EM: douglas.c.hamilton@umail.umd.edu
AF: University of Maryland, Department of Physics, College Park, MD 20742 United States
AU: Kurth, W S
EM: william-kurth@uiowa.edu
AF: University of Iowa, Department of Physics, Iowa City, IA 52242 United States
AU: Gurnett, D A
EM: donald-gurnett@uiowa.edu
AF: University of Iowa, Department of Physics, Iowa City, IA 52242 United States
AU: Zarka, P
EM: Philippe.Zarka@obspm.fr
AF: Observatoire de Paris - Section de Meudon, 5, Place Jules Janssen 92195 MEUDON CEDEX, Meudon, 92195 France
AB: The Ion and Neutral Camera (INCA), one of three sensors that comprise the Magnetospheric Imaging Instrument (MIMI) on the Cassini/Huygens mission to Saturn and Titan, is designed to operate in one of two modes: either as a high geometry factor ion instrument with high angular resolution, or as an Energetic Neutral Atom (ENA) camera that images the ENA emission from various ion/gas interaction regions in the Saturnian magnetosphere. During Cassini's approach and the first two orbits about Saturn we have begun analyzing INCA data at great distances, where Saturn is an unresolved source. Our emphasis for most of this period is in characterizing variations in the source strength on time scales of hours to weeks (especially looking for periodicities at Saturn's rotation period) and correlating those variations with upstream ion activity as seen in the MIMI ion data, as well as with Saturn Kilometric Radiation as measured by the University of Iowa Radio and Plasma Wave Science instrument. In contrast, during Saturn Orbit Insertion with its traversal of the region inside the radius of Saturn's main rings, INCA had the opportunity to image the interaction between the inner magnetospheric trapped ion population and the inner magnetospheric cold gas population. During the portions of the second Cassini orbit when Cassini returns to within 20 Rs of Saturn, we expect to have additional resolved images of the inner magnetospheric ENA emission region that will add to our knowledge of the spatial distribution of the energetic ions and cold gas inside about 10 Rs, the region that dominates the Saturn output of ENA.
UR: http://sd-www.jhuapl.edu/CASSINI/
DE: 2720 Energetic particles, trapped
DE: 2732 Magnetosphere interactions with satellites and rings
DE: 2740 Magnetospheric configuration and dynamics
DE: 2756 Planetary magnetospheres (5443, 5737, 6030)
DE: 2784 Solar wind/magnetosphere interactions
SC: Planetary Sciences [P]
MN: 2004 AGU Fall Meeting