title: Cassini measurements of cold plasma in the ionosphere of Titan.
abstract: The Cassini Radio and Plasma Wave Science (RPWS) Langmuir probe (LP) sensor observed the cold plasma environment around Titan during the first two flybys. The data show that conditions in Saturn's magnetosphere affect the structure and dynamics deep in the ionosphere of Titan. The maximum measured ionospheric electron number density reached 3800 per cubic centimeter near closest approach, and a complex chemistry was indicated. The electron temperature profiles are consistent with electron heat conduction from the hotter Titan wake. The ionospheric escape flux was estimated to be 10(25) ions per second.
authors.affiliation: Swedish Institute of Space Physics, Box 537, SE-751 21 Uppsala, Sweden. jwe@irfu.se
authors.forename: J E
authors.initials: JE
authors.lastname: Wahlund
authors.forename: R
authors.initials: R
authors.lastname: Boström
authors.forename: G
authors.initials: G
authors.lastname: Gustafsson
authors.forename: D A
authors.initials: DA
authors.lastname: Gurnett
authors.forename: W S
authors.initials: WS
authors.lastname: Kurth
authors.forename: A
authors.initials: A
authors.lastname: Pedersen
authors.forename: T F
authors.initials: TF
authors.lastname: Averkamp
authors.forename: G B
authors.initials: GB
authors.lastname: Hospodarsky
authors.forename: A M
authors.initials: AM
authors.lastname: Persoon
authors.forename: P
authors.initials: P
authors.lastname: Canu
authors.forename: F M
authors.initials: FM
authors.lastname: Neubauer
authors.forename: M K
authors.initials: MK
authors.lastname: Dougherty
authors.forename: A I
authors.initials: AI
authors.lastname: Eriksson
authors.forename: M W
authors.initials: MW
authors.lastname: Morooka
authors.forename: R
authors.initials: R
authors.lastname: Gill
authors.forename: M
authors.initials: M
authors.lastname: André
authors.forename: L
authors.initials: L
authors.lastname: Eliasson
authors.forename: I
authors.initials: I
authors.lastname: Müller-Wodarg
mesh_terms: D001272:Atmosphere; D005118:Extraterrestrial Environment; D007477:Ions; D008280:Magnetics; D018539:Saturn; D018531:Spacecraft; D013696:Temperature
chemical_list: D007477:Ions