Pre-landslide topographic reconstruction in Baetis Chaos, mars using a CaSSIS Digital Elevation Model

Planview detailed morphological analysis of martian landslides is usually performed using orbital imagery such as from the ConTeXt camera (CTX) at 6 ​m/pix, Colour and Stereo Surface Imaging System (CaSSIS) 4.5 ​m/pix or High-Resolution Science Experiment (HiRISE) 0.25–0.5 ​m/pix. However, topographic information key to fully understand a landslide's formation mechanism its mobility, by estimating material volumes mobilised spatial distribution erosion deposition. Digital Elevation Models (DEM) are required carry out these analyses; nevertheless, there currently gap in landslide-volume studies between those Mars Orbiter Laser Altimeter (MOLA) dataset ∼450 HRSC 50–200 m/pix HiRISE data 1–2 m/pix, which only partially filled CTX elevation ∼20 The CaSSIS on board ESA/Trace Gas Obiter (TGO) can be used produce DEMs, but so far, have not yet been conduct landslide volume analysis. Here, we use three reconstruction methods (semi-automatic, morphology-based tilted) DEM estimate initial topography hence deposition ​km long Baetis Chaos. Despite complex surrounding area due presence an ejecta deposit beneath landslide, were able mass distribution. Using tilted plane part produced best results. We evaluated success considering quantifiable balance (given uncertainties) more subjectively whether matched with what was expected based morphology images alone. Therefore, recommend this method for individual where knowledge deposit-thickness required. semi-automatic produces satisfactory estimates would better suited hundreds present. found that successfully analyses, providing additional coverage study medium-scale other landforms similar scale (5–15 ​km) notable benefit it provides single-pass stereo image acquisition.