Abstract
Abstract. Since January 2004 the High Resolution Stereo Camera (HRSC) is mapping planet Mars. The multi-line sensor on board the ESA Mission Mars Express images the Martian surface with a resolution of up to 12m per pixel in three dimensions and in color. As part of the Photogrammetric/Cartographic Working Group of the HRSC Science Team the Institute of Photogrammetry and GeoInformation (IPI) of the Leibniz Universit¨at Hannover is involved in photogrammetrically processing the HRSC image data. To derive high quality 3D surface models, color orthoimages or other products, the accuracy of the observed position and attitude information in many cases should be improved. This is carried out via a bundle adjustment. In a considerable number of orbits the results of the bundle adjustment are disturbed by high frequency oscillations. This paper describes the impact of the high frequency angular spacecraft movement to the processing results of the last seven years of image acquisition and how the quality of the HRSC data products is significantly improved by modeling these oscillations.
Highlights
The Mars Express mission conducted by the European Space Agency (ESA) is investigating the Red Planet since January 2004
The results presented in the chapter, are obtained by using an adjustment concept specially developed for the High Resolution Stereo Camera (HRSC) data (Spiegel, 2007b)
It was possible to process all available data of the HRSC on a computer cluster at the RRZN (Regionales Rechenzentrum fur Niedersachsen) in a reasonable time
Summary
The Mars Express mission conducted by the European Space Agency (ESA) is investigating the Red Planet since January 2004. A large number of automatically determined tie points is used in a bundle adjustment to improve the accuracy of the exterior orientation and to exploit the full potential of the stereo image data. The concept of the bundle adjustment for HRSC imagery is described It is based on the well known approach used in photogrammetry for aerial triangulation, by which the exterior orientation is simultaneously determined for all images used in the bundle adjustment. Almost three decades ago the concept of orientation points was proposed to solve this problem (Hofmann et al, 1982) Today it is a common approach in the processing of multi-line sensor data. A combined bundle adjustment for HRSC image data and the MOLA DTM as control information was developed, implemented and tested (Spiegel, 2007b)
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