Search Publications
Pre-landslide topographic reconstruction in Baetis Chaos, mars using a CaSSIS Digital Elevation Model
Mangold, N.; Pajola, M.; Cremonese, G. +8 more
Planview detailed morphological analysis of martian landslides is usually performed using orbital imagery such as from the ConTeXt camera (CTX) at 6 m/pix, the Colour and Stereo Surface Imaging System (CaSSIS) at 4.5 m/pix or the High-Resolution Imaging Science Experiment (HiRISE) at 0.25-0.5 m/pix. However, topographic information is key to fully…
Impact of dust loading on ozone, winds and heating rates in the atmosphere of mars: Seasonal variability, climatology and SPICAM observations
Haider, S. A.; Masoom, J.; Siddhi, Y. S. +2 more
We have used SPICAM-UV nadir observations for four Martian Years (MY27-MY30) to study the seasonal variability of column abundances of ozone and dust opacity at low latitudes (10°-30°), mid-latitudes (30°-50°) and high latitudes (50°-70°) in both hemispheres. The observed column abundances of ozone are compared with the Mars Climate Database (MCD,…
Calibration of NOMAD on ExoMars Trace Gas Orbiter: Part 3 - LNO validation and instrument stability
Vandaele, A. C.; Daerden, F.; Thomas, I. R. +7 more
The LNO channel is one of the 3 instruments of the NOMAD suite of spectrometers onboard the ExoMars Trace Gas Orbiter currently orbiting Mars. Designed to operate primarily at nadir at very high spectral resolution in the 2.3 µm-3.8 µm spectral region, the instrument observes the martian atmosphere and surface daily since March 2018. T…
Complementary astrometry of Cassini Imaging Science Subsystem images of Phoebe
Li, Y.; Cooper, N. J.; Lainey, V. +5 more
Phoebe is the only major satellite of Saturn with a retrograde orbit. The Cassini Imaging Science Subsystem (ISS) took a lot of Phoebe images between 2004 and 2017, but only a selection of them has been reduced. In this paper, we reduced the remaining ISS images of Phoebe. In the reduction, the Gaia EDR3 catalogue was used to provide the reference…
Morphological and hydrological analysis of volcanic flank valleys - Evidence for a volcanic origin
Bahia, Rickbir S.
Valley networks incising the flanks of Martian volcanoes are potential evidence of geologically recent fluvial activity, either via geothermal heating of snowmelt and groundwater upwelling [Gulick and Baker, 1989, 1990; Gulick et al., 1997; Gulick, 2001; Hynek et al., 2010], or summit snowpack melt [Fassett and Head, 2006, 2007]; however, their or…
The astrometric results of observations of fast-moving NEAs during close approach to the Earth
Yu, Yong; Tang, Zheng-Hong; Pomazan, Anton +4 more
Current investigation is devoted to ongoing follow-up observations of fast-moving near-Earth asteroids (NEAs) carried out with Rotating-drift-scan CCD technique on small-aperture telescopes in China and Ukraine. The observations were obtained during closest approach (CA) to the Earth in order to get more observational points and extend observation…
Geometric processing of TGO CaSSIS observations
McEwen, Alfred; Tornabene, Livio L.; Byrne, Shane +7 more
The Colour and Stereo Surface Imaging System (CaSSIS) is the scientific imager onboard the European Space Agency/Roscosmos ExoMars Trace Gas Orbiter. CaSSIS has one of the most advanced capabilities for colour imaging of the Martian surface on any spacecraft currently orbiting Mars. Such capability can only be utilized, however, by accurate geomet…
Patterns of martian glacial deformation: Implications for glacio-geology, internal structure, and regional climate
Conway, Susan J.; Becerra, Patricio; Grau Galofre, Anna +2 more
Viscous Flow Features (VFF) are widespread in the martian mid-latitudes and indicative of near-surface ice deposits. Their distribution and morphology hint at the regional history of ice deposition and ablation, as well as changes in surface temperature. Here we interrogate the deformation history of a type of VFF, a Lobate Debris Apron (LDA), loc…
Lack of evidence for paleolakes in the Aeolis Dorsa region, Mars; a mapping investigation
Burr, D. M.; Peel, S. E.
The discovery of impact crater paleolakes, like the discoveries of ancient fluvial valleys, has been instrumental in our developing understanding of the history of water on Mars. Numerous and varied inverted paleo-fluvial deposits have been found within the westernmost lobes (Aeolis and Zephyria Plana) of the Medusae Fossae Formation, ∼800 km east…
On the potential variation of charged dust in Saturn's magnetosphere: The dust-plasma interaction
Rehman, Umer; Hussain, Ibrar; Qammar, Ambreen
We presented a theory describing interaction between cold plasma and dust grain based on Cassini observations of Enceladus in Saturn's E ring. We assumed a finite-sized dust cloud with inside plasma to simulate the environment. The dust cloud that results from this scenario has a different potential than the surrounding plasma. Cassini's observati…