Search Publications
Observations of upper tropospheric acetylene on Saturn: No apparent correlation with 2000 km-sized thunderstorms
Fletcher, L. N.; Irwin, P. G. J.; Moses, J. I. +4 more
Thunderstorm activity has been observed on Saturn via radio emissions from lightning discharges and optical detections of the lightning flashes on the planet's nightside. Thunderstorms provide extreme environments in which specific atmospheric chemistry can be induced-namely through energy release via lightning discharges, and fast vertical transp…
Auroral streamers implication for the substorm progression on September 14, 2004
Frey, H. U.; Kubyshkina, M. V.; Fu, S. Y. +9 more
Magnetospheric substorms manifest a fundamental disturbance in geospace. Understanding of substorm progression is essential for solar terrestrial physics and space weather research. The auroral streamer and the bursty bulk flows (BBFs) were simultaneously observed by the IMAGE/WIC and the Cluster in the midtail (X∼-16RE), whose footprin…
The Rosetta mission—Exploring solar system formation
Schulz, R.
The Rosetta campaign to detect an exosphere at Lutetia
Stern, S. A.; Altwegg, K.; A'Hearn, M. F. +15 more
On 10th July 2010 the Rosetta spacecraft passed within 3160 km of asteroid 21 Lutetia during which seven instruments attempted to detect an exosphere. A comparison of the sensitivity is made between the different instruments based on a simple spherical out-gassing point source model, which was used to infer that the Lutetia exosphere production ra…
Saturn's magnetosphere interaction with Titan for T9 encounter: 3D hybrid modeling and comparison with CAPS observations
Hartle, R. E.; Sittler, E. C.; Cooper, J. F. +2 more
Global dynamics of ionized and neutral gases in the environment of Titan plays an important role in the interaction of Saturn's magnetosphere with Titan. Several hybrid simulations of this problem have already been done (Brecht et al., 2000; Kallio et al., 2004; Modolo et al., 2007a; Simon et al., 2007a, 2007b; Modolo and Chanteur, 2008). Observat…
Test-field for evaluation of laboratory craters using a Crater Shape-based interpolation crater detection algorithm and comparison with Martian and Lunar impact craters
Lončarić, Sven; Vinković, Dejan; Salamunićcar, Goran +5 more
Impact craters are some of the most abundant geological features on most lunar and planetary bodies, providing insight into the history and physical processes that shaped their surface. It is therefore not surprising that extensive research has been done in the past on laboratory craters, as well as on crater detection algorithms (CDAs). No prior …
On the small-scale fluctuations in the peak electron density of Martian ionosphere observed by MEX/MARSIS
Wang, X. -D.; Zou, H.; Wang, J. -S.
We reported the small-scale fluctuations in the peak electron density of dayside Martian ionosphere observed by MEX/MARSIS. MARSIS is an ionospheric sounder that can measure the vertical electron density profile of the topside ionosphere. In the experiment the ionospheric critical frequency can be determined within the accuracy of 5 kHz, correspon…
High-resolution atlas of Rhea derived from Cassini-ISS images
Scholten, F.; Matz, K. -D.; Neukum, G. +7 more
The Cassini Imaging Science Subsystem (ISS) acquired 370 high-resolution images (<500 m/pixel) of Rhea during two close flybys and 9 non-targeted flybys between 2004 and 2010. We combined these images with lower-resolution Cassini images and others taken by the Voyager cameras to produce a high-resolution semi-controlled mosaic of Rhea. This gl…
Pit distribution in the equatorial region of Titan
Adams, Kimberly A.; Jurdy, Donna M.
Cassini radar images of Titan's surface reveal numerous dark circular features in the equatorial region. These may be related to methane sublimation and have been interpreted as pits. In the T8 equatorial swath, we identify 199 individual pits and estimate their diameters. We analyze the observed spatial distribution and size to characterize these…
Possible physical cause of the zonal wind collapse on Titan
Coustenis, Athena; Li, Jianping; Liu, Dong +1 more
A high-resolution vertical profile of Titan's winds was inferred from ground-based radiotelescopes, which recorded the Doppler Wind Experiment measurements of the carrier frequency during the Huygens mission (Bird et al., 2005). It indicates the existence of a wind shear layer with surprisingly low wind speed nearing zero, at altitudes between 60 …