Search Publications
Fluvial morphology of Naktong Vallis, Mars: A late activity with multiple processes
Mangold, N.; Neukum, G.; Ansan, V. +2 more
The morphology of fluvial valleys on Mars provides insight into surface and subsurface hydrology, as well as to Mars' past climate. In this study, Naktong Vallis and its tributaries were examined from high-resolution stereoscopic camera (HRSC) images, thermal emission imaging system (THEMIS) daytime IR images, and mars orbiter laser altimeter (MOL…
VIMS spectral mapping observations of Titan during the Cassini prime mission
Drossart, Pierre; Sotin, Christophe; Sicardy, Bruno +29 more
This is a data paper designed to facilitate the use of and comparisons to Cassini/visual and infrared mapping spectrometer (VIMS) spectral mapping data of Saturn's moon Titan. We present thumbnail orthographic projections of flyby mosaics from each Titan encounter during the Cassini prime mission, 2004 July 1 through 2008 June 30. For each flyby w…
High-resolution Atlases of Mimas, Tethys, and Iapetus derived from Cassini-ISS images
Scholten, F.; Matz, K. -D.; Neukum, G. +8 more
The Cassini Imaging Science Subsystem (ISS) acquired 282, 258, and 513 high-resolution images (<800 m/pixel) of Mimas, Tethys, and Iapetus, respectively, during two close flyby of Tethys and Iapetus and eight non-targeted flybys between 2004 and 2007. We combined these images with lower-resolution Cassini images and others taken by Voyager came…
Energetic ions trapped in Saturn's inner magnetosphere
Krupp, N.; Krimigis, S.; Armstrong, T. P. +4 more
The low-energy magnetospheric measurement system (LEMMS) of the magnetosphere imaging instrument (MIMI) aboard the Cassini orbiter observed energetic ions and electrons during Saturn orbit insertion (SOI) of July 1, 2004. Salient features of the trapped ion fluxes observed in the L=2-4 RS region include the occurrence of two distinct co…
Geologic features of Wudalianchi volcanic field, northeastern China: Implications for Martian volcanology
Xiao, Long; Wang, Chunzeng
Wudalianchi volcanic field, located in northeast China, consists of 14 Quaternary volcanoes with each volcano as a steep-sided scoria cone surrounded by gently sloping lava flows. Each cone is topped with a bowl-shaped or funnel-shaped crater. The volcanic cones are constructed by the accumulation of tephra and other ejecta. In this paper, their g…
Observations of CO in the atmosphere of Mars with PFS onboard Mars Express
Forget, F.; Lellouch, E.; Encrenaz, T. +8 more
We have analyzed spectra of CO recorded with the instrument PFS onboard Mars Express in the (1-0) 4.7µm band. The dataset we used ranges in time from January until June 2004 ( LS=331∘.17 until LS=51∘.61; end of Mars Year 26, beginning of Mars Year 27). The aim of this work was to determine the ampl…
Response of Saturn's ionosphere to solar radiation: Testing parameterizations for thermal electron heating and secondary ionization processes
Galand, Marina; Moore, Luke; Mendillo, Michael +1 more
We evaluate the effectiveness of two parameterizations in Saturn's ionosphere over a range of solar fluxes, seasons, and latitudes. First, the parameterization of the thermal electron heating rate, Q* e, introduced in [Moore, L., Galand, M., Mueller-Wodarg, I., Yelle, R.V., Mendillo, M., 2008. Plasma temperatures in Saturn's ionosphere.…
Analysis of a cryolava flow-like feature on Titan
Le Mouélic, S.; Rodriguez, S.; Sotin, C. +11 more
This paper reports on the analysis of the highest spatial resolution hyperspectral images acquired by the Visual and Infrared Mapping Spectrometer (VIMS) onboard the Cassini spacecraft during its prime mission. A bright area matches a flow-like feature coming out of a caldera-like feature observed in Synthetic Aperture Radar (SAR) data recorded by…
Episodes of floods in Mangala Valles, Mars, from the analysis of HRSC, MOC and THEMIS images
Head, James W.; Greeley, Ronald; van Gasselt, Stephan +9 more
The Mangala Valles is a 900-km long outflow channel system in the highlands adjacent to the south-eastern flank of the Tharsis bulge. This work was intended to answer the following two questions unresolved in previous studies: (1) Was there only one source of water (Mangala Fossa at the valley head which is one of the Medusae Fossae troughs or gra…
Cassini Langmuir probe measurements in the inner magnetosphere of Saturn
Wahlund, J. -E.; Jacobsen, K. S.; Pedersen, A.
In the inner magnetosphere of Saturn, the plasma density and drift velocity are high enough, and the photoelectron current low enough, for a Langmuir probe to produce useful data on ion parameters. Plasma density and velocity are found by analyzing the current due to collected ions and emitted photoelectrons for a negative probe potential. In orde…