On 14 March 2019, the ExoMars CaSSIS (Colour and Stereo Surface Imaging System) team released new images from Mars. The camera system was developed at the University of Bern by an international team led by Prof. Nicolas Thomas and,since April 2018, it delivers high-resolution color images and digital terrain models of Mars. The images were produced by teams from the University of Bern, University of Arizona and the Observatory of Padova of the Italian National Institute for Astrophysics (INAF). These high-resolution images shows peculiar features of the surface of Mars, even in 3D, and highlight the mineralogic variety of the surface (click on the images to find more specific informations).
Besides high-resolution color images of the surface of Mars, the CaSSIS camera offers the possibility to acquire the so called stereo-pairs (i.e images of the same place taken with particular viewing conditions), which are essential to the generation of digital terrain models (DTMs). The latter are of pivotal importance for the quantitative analysis and interpretation of CaSSIS images.
The Digital Terrain Models have been generated through a stereo photogrammetric process implemented in the 3DPD software developed by the INAF-Padova. The DTMs have been created starting from the CaSSIS stereo pairs obtained from a mosaicking procedure able to combine the thirty framelets that typically define the stereo acquisition. The images and the derived 3D models have a pixel scale of 4.6 m that permits an high resolution feature analysis.
Two examples of such datasets are provided here: