Abstract
Abstract. 10 years ago the first European interplanetary mission Mars Express was launched and sent into orbit around Mars. One of the scientific instruments on board the orbiter is the High Resolution Stereo Camera (HRSC). This multi-line sensor with five panchromatic and four multispectral CCD lines was developed by the German Aerospace Center (DLR) for photogrammetric mapping purposes. It images the Martian surface with a resolution of up to 12 m per pixel, depending on the altitude. The along-track stereo capability of the camera delivers image strips with three-dimensional information, which cover nearly the whole planet. For a derivation of more accurate digital terrain models and orthoimages the orientation data of the camera is improved via bundle adjustment. To map larger regions overlapping image strips can be used to form photogrammetric blocks, thus allowing a simultaneous adjustment of the different strips. Compared to the adjustment of individual strips, an adjustment of the entire block reduces not only local, but also regional inconsistencies in the data. With the growing number of HRSC image strips in this ongoing mission, number, size and complexity of potential blocks increases. To cope with these data a method for a semi-automated analysis, selection and combination of suitable strips for the design of more accurate and reliable blocks has been developed. The method takes the inhomogeneity of the HRSC data into account by adapting the processing parameters, if necessary for each strip.
Highlights
In the past 50 years many space probes have been launched into space for the exploration of our neighboring planet Mars
On board the orbtier is the High Resolutioon Stereo Camera (HRSC). This multi-line sensor with five panchromatic and four multispectral CCD lines was developed by the German Aerospace Center (DLR)
In the second step the attitude is treated as constant and the relative position between the strips and the absolute position with respect to the reference frame (the Mars Orbiter Laser Altimeter (MOLA) digital terrain models (DTMs) is used here) is adjusted. 2.1 Selection of image strips When selecting a set of HRSC image strips for a block, a number of criteria has to be taken into account
Summary
In the past 50 years many space probes have been launched into space for the exploration of our neighboring planet Mars. More than 10 years ago, on December 25, 2003, a European mission reached the Martian orbit - Mars Express. It is the first interplanetary mission designed, built and managed by the European Space Agency (ESA), and is still delivering data. On board the orbtier is the High Resolutioon Stereo Camera (HRSC) This multi-line sensor with five panchromatic and four multispectral CCD lines was developed by the German Aerospace Center (DLR). It is the first camera in planetary research especially designed for photogrammetric mapping purposes (Neukum et al, 2004), (Albertz et al, 2005), (Jaumann et al, 2007)
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