Geometric calibration of Colour and Stereo Surface Imaging System of ESA’s Trace Gas Orbiter |
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| Authors: | Stepan Tulyakov Anton Ivanov Nicolas Thomas Victoria Roloff Antoine Pommerol Gabriele Cremonese Thomas Weigel Francois Fleuret |
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| Institution: | 1. École Polytechnique Federale de Lausanne, EPFL-ENT-ESC, Station 13, 1015 Lausanne, Switzerland;2. Physics Institute, Space Research and Planetary Sciences, University of Bern, Sidlerstrasse 5, 3012 Bern, Switzerland;3. INAF, Osservatorio Astronomico di Padova, Vicolo Osservatorio 5, 35122 Padova, Italy;4. RUAG Space, RUAG Schweiz AG Schaffhauserstrasse 580, 8052 Zürich, Switzerland;5. Idiap Research Institute, Rue Marconi 19, 1920 Martigny, Switzerland |
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| Abstract: | There are many geometric calibration methods for “standard” cameras. These methods, however, cannot be used for the calibration of telescopes with large focal lengths and complex off-axis optics. Moreover, specialized calibration methods for the telescopes are scarce in literature. We describe the calibration method that we developed for the Colour and Stereo Surface Imaging System (CaSSIS) telescope, on board of the ExoMars Trace Gas Orbiter (TGO). Although our method is described in the context of CaSSIS, with camera-specific experiments, it is general and can be applied to other telescopes. We further encourage re-use of the proposed method by making our calibration code and data available on-line. |
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| Keywords: | Geometric calibration Optical distortion Off-axis Star field CaSSIS TGO Telescope Rational distortion model |
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