Search Publications
On a systematic spectral variation of energetic ions in the Jovian outer magnetosphere: HI-SCALE/Ulysses observations
Sarris, E. T.; Anagnostopoulos, G. C.; Marhavilas, P. K.
An important finding of Ulysses flyby of Jupiter is the discovery of a large-scale energetic particle layer adjacent to the magnetopause. Previous studies discussed the particle flux and the anisotropy characteristics of this layer. This study examines the spectral characteristics of the large-scale magnetopause boundary layer of energetic particl…
Simulation and analysis of the revised Huygens probe entry and descent trajectory and radio link modelling
Lebreton, J. -P.; Kazeminejad, B.; Pérez-Ayúcar, M. +7 more
The Cassini spacecraft will arrive at Saturn in 2004 carrying the Huygens probe. The beginning of the Cassini tour at Saturn has been redesigned to achieve a different relative orbiter/probe geometry in order to compensate for the probe relay receiver design flaw that was discovered during tests in February 2000. This paper presents a numerical si…
Visualization and topographical analysis of the Mars surface
Dorninger, P.; Jansa, J.; Briese, Ch.
The Institute of Photogrammetry and Remote Sensing has more than 30 years of experience in computation, visualization and analysis of digital terrain data. Most of the developed methods and algorithms are implemented in the software application SCOP++ and tested on Earth datasets. Due to the institute's involvement into Mars Express, these methods…
Evidence for chaotic dynamics in the Jovian magnetosphere
Sarris, E. T.; Anagnostopoulos, G. C.; Pavlos, G. P. +2 more
In this paper, for the first time we examine the hypothesis of chaotic behaviour for the dynamics of the inner of Jupiter's magnetosphere as which is appeared in energetic populations. For this, we study geometrical and dynamical characteristics of Jovian energetic ion time series in the reconstructed phase space by using the SVD extended chaotic …
Huygens/HASI 2002 balloon test campaign: Probe trajectory and atmospheric vertical profiles reconstruction
Fulchignoni, M.; Colombatti, G.; Ferri, F. +2 more
In the framework of the activities going on in preparation for the mission of the Huygens probe in Titan's atmosphere (January 2005), the Huygens Atmospheric Structure Instrument (HASI) team scheduled and performed several balloon campaigns to test the HASI sensors' performance in flight conditions in the Earth's atmosphere. In particular, pressur…
Beagle-2 position determination from the returned camera panoramas using MOLA data
Michael, G. G.
After the Beagle-2 lander of the Mars Express mission comes to rest on the surface of Isidis Planitia in late December 2003 to carry out a range of geochemistry and exobiology experiments, there will be considerable interest in determining its exact location. This work considers the feasibility of identifying topographic features seen in the Mars …
Scientific instruments studied by Galileo Avionica for Mars surface exploration
Cosi, M.; Battistelli, E.; Bini, A. +3 more
Several missions for planetary explorations, including comets and asteroids, are planned by the space agencies: Rosetta (close to the launch date at the time of writing) Bepi Colombo, Mars Programme in all its past and next missions. The satisfaction of this scientific request calls for the development of some instruments and facilities devoted to…
Environmental predictions for the Beagle 2 lander, based on GCM climate simulations
Newman, C. E.; Lewis, S. R.; Read, P. L. +1 more
The Mars climate database (MCD) is a database of statistics based on output from physically consistent numerical model simulations which describe the climate and surface environment of Mars. It is used here to predict the meteorological environment of the Beagle 2 lander site. The database was constructed directly on the basis of output from multi…
Composition and origin of the atmosphere of Jupiter - an update, and implications for the extrasolar giant planets
Wong, M. H.; Atreya, S. K.; Owen, T. C. +2 more
New developments have led to this update of the composition and origin of Jupiter's atmosphere that were originally discussed in our Planet. Space Sci. 47 (1999) 1243 paper. Since Jupiter can provide important insight into the atmospheres of extrasolar giant planets (EGP), we also discuss here the possible implications of the first detection of an…
Chemical sources of haze formation in Titan's atmosphere
Atreya, S. K.; Wilson, E. H.
A prominent feature of Titan's atmosphere is a thick haze region that acts as the end product of hydrocarbon and nitrile chemistry. Using a one-dimensional photochemical model, an investigation into the chemical mechanisms responsible for the formation of this haze region is conducted. The model derives profiles for Titan's atmospheric constituent…