HR: 1340h
AN: P53A-1453    [Abstracts]
TI: Preliminary Interpretation of Titan Plasma Interaction as Observed by the Cassini Plasma Spectrometer: Comparisons With Voyager 1
AU: * Hartle, R E
EM: Richard.E.Hartle@nasa.gov
AF: NASA Goddard Space Flight Center, Code 910, Greenbelt Road, Greenbelt, MD 20771 United States
AU: Sittler, E C
EM: edward.c.sittler@nasa.gov
AF: NASA Goddard Space Flight Center, Code 910, Greenbelt Road, Greenbelt, MD 20771 United States
AU: Andre, N
EM: Nicolas.Andre@cesr.fr
AF: CESR, 9, avenue du Colonel Roche, Toulous, 4346 31028 France
AU: Johnson, R E
EM: rej@unix.mail.virginia.edu
AF: University of Virginia, Engineering Physics, Thornton Hall, Charlottesville, VA 22904 United States
AU: Smith, H T
EM: hts4f@virginia.edu
AF: University of Virginia, Engineering Physics, Thornton Hall, Charlottesville, VA 22904 United States
AU: Crary, F
EM: fcrary@swri.edu
AF: Southwest Research Institute, 6220 Culebra Road, San Antonio, TX 78228-0510 United States
AU: McComas, D J
EM: dmccomas@swri.edu
AF: Southwest Research Institute, 6220 Culebra Road, San Antonio, TX 78228-0510 United States
AU: Young, D T
EM: dyoung@swri.edu
AF: Southwest Research Institute, 6220 Culebra Road, San Antonio, TX 78228-0510 United States
AU: Coates, A J
EM: ajc@mssl.ucl.ac.uk
AF: Mullard Space Flight Center, Holmbury St. Mary, Dorking, Surrey, RH5 6NT United Kingdom
AU: Bolton, S
EM: Scott.J.Bolton@jpl.nasa.gov
AF: Jet Propulsion Laboratory, MS 230-205 4800 Oak Grove Drive, Pasadena, CA 91109 United States
AU: Reisenfeld, D
EM: dan.reisenfeld@umontana.edu
AF: University of Montana, Department of Physics & Astronomy 32 Campus Drive , Missoula, MT 59812 United States
AU: Szego, K
EM: szego@rmki.kfki.hu
AF: KFKI-RMKI, KFKI Research Institute for Particle and Nuclear Physics Konkoly Thege str. 29-33, Bldg. III, Budapest, H-1525 Hungary
AU: Bethelier, J
EM: jacques.berthelier@cetp.ipsl.fr
AF: Centre d'etude des Environnements Terrestre et Planetaires, Observatoire de Saint-Maur 4 Avenue de Neptune, St. maur-des-Fosses, 94107 France
AU: Rymer, A
EM: amr@mssl.ucl.ac.uk
AF: Mullard Space Flight Center, Holmbury St. Mary, Dorking, Surrey, RH5 6NT United Kingdom
AU: Hill, T W
EM: hill@rice.edu
AF: Rice University, Physics and Astronomy Department MS 108, Houston, TX 77251-1892 United States
AU: Vilppola, J
EM: jari.vilppola@oulu.fi
AF: University of Oulu, Department of Physical Sciences, Linnanmaa, FIN-90014 Finland
AU: Steinberg, J
EM: jsteinberg@lanl.gov
AF: Los Alamos National Laboratory, Space and Atmospheric Science Group MS: D-466, Los Alamos, NM 87545 United States
AB: The Cassini Plasma Spectrometer (CAPS) instrument is scheduled to observe the plasma environment at Titan October 26, 2004 from the Cassini Orbiter. Preliminary CAPS ion measurements from this encounter (1, 2) will be compared with measurements made by the Voyager I Plasma Science Instrument (PLS). The comparison will be used to evaluate previous interpretations and predictions of the Titan plasma environment that have been made using PLS measurements (3, 4). The comparisons will focus on the composition and nature of the ambient plasma and pickup ions. Using the CAPS ion measurements, some of the questions to be addressed, as stimulated by the previous interpretations and predictions made evaluating PLS data, are the following: A) Are H+ and N+ the major ion components of Saturn's rotating magnetosphere in the vicinity of Titan? B) Are finite gyroradius effects apparent in ambient N+ as the result of its interaction with Titan's atmosphere? C) Are the principal pickup ions composed of H+, H2+, N+, N2+ and CH4+?, D) Is there evidence of slowing down of the ambient plasma due to pickup ion mass loading and as the ionopause is approached are heavier pickup ions becoming dominant such as N2+? During the Voyager I flyby, Titan was in Saturn's magnetosphere. If Titan is in Saturn's magnetosheath or the solar wind at the encounter, questions similar to the above will be addressed as appropriate. 1. Young et al., this issue, Fall AGU session, 2004. 2. Coates, et al., this issue, Fall AGU session, 2004 3. Hartle et al., J. Geophys. Res., 87, 1383, 1982. 4. Sittler et al., Titan Symposium Proceedings, ESTEC, Editor, Jean-Pierre Lebreton, 2004.
DE: 7807 Charged particle motion and acceleration
DE: 6026 Ionospheres--composition and chemistry
DE: 6028 Ionospheres--structure and dynamics
DE: 6280 Saturnian satellites
DE: 2459 Planetary ionospheres (5435, 5729, 6026, 6027, 6028)
SC: Planetary Sciences [P]
MN: 2004 AGU Fall Meeting