Geometric and Radiometric Modeling of the Martian Surface Based on Object Space Matching and Photoclinometry

The unique image data of the High Resolution Stereo Camera (HRSC) on Mars Express enable for systematic derivation of Digital Terrain Models (DTMs) and orthoimages. Consequently, several photogrammetric processing algorithms have been investigated with HRSC imagery. The results form the basis for further research including photometric analysis. Within this paper, an integrated approach for photogrammetric and photometric modeling is presented: the combination of matching in object space and photoclinometry. Using both geometric and radiometric image properties, geometry (DTM) and radiometry (Hapke reflectance parameters) of the Martian surface as well as atmospheric properties are jointly derived. Results will be shown for the Gusev crater southern hills and for an area with two small impact craters.