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Insights into the interaction between defrosting seasonal ices and gully activity from CaSSIS and HiRISE observations in Sisyphi Cavi, Mars

Pajola, M.; Munaretto, G.; Vincendon, M. +10 more

Martian gullies are surface features, typically composed of an alcove, a channel and a depositional apron. They have been extensively studied since their first observations in the 2000s and were initially attributed to the action of liquid water. Later studies highlighted that their activity is spatially and temporally correlated with the seasonal…

Targeting and image acquisition of Martian surface features with TGO/CaSSIS

Cremonese, G.; Thomas, N.; Pommerol, A. +12 more

CaSSIS is a high-resolution visual telescope onboard the ExoMars Trace Gas Orbiter. The mission started the primary science phase in April 2018. The relatively small single image footprint (typically 40 km × 9.5 km) when compared to the total surface area of Mars demands that images should be targeted and target selection is key for the science re…

Preface for special issue on the Colour and Stereo Surface Imaging System (CaSSIS) at Mars

Sefton-Nash, Elliot; Wilson, Colin; Hauber, Ernst +2 more

The Colour and Stereo Surface Imaging System (CaSSIS) is the main camera on board the ExoMars Trace Gas Orbiter (TGO). Following launch of TGO on 14 March 2016, CaSSIS began nominal science operations in April 2018. At the time of writing CaSSIS has acquired an average of 21 observations per day, totaling 20.5 Tbits of downlinked telemetry, and ha…