Observations of polar and sedimentary processes on Mars with the CaSSIS imaging system

The Colour and Stereo Surface Imaging System (CaSSIS) onboard the ExoMars Trace Gas Orbiter has been taking images of the surface of Mars at 4.5 metres/pixel in four colours since April 2018 and provides a new tool to study the geormophology of Mars. CaSSIS observations add to the existing data sets by increasing surface coverage, providing single stereo observations, and producing high signal to noise colour products. The data are being used to study seasonal dynamic phenomena up to a latitude of 74 degrees in both hemispheres. The colour products are being used to study the 2020 landing sites (Oxia Planum and Jezero crater) as well as studying the detailed topographic-compositional relationships in many regions of Mars. The presentation will provide a brief overview of the current data set and instrument capabilites, focussing on observations of polar processes and sedimentary deposits at all accessible latitudes.