The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
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Articles | Volume XLIII-B3-2021
Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XLIII-B3-2021, 673–678, 2021
https://doi.org/10.5194/isprs-archives-XLIII-B3-2021-673-2021
Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XLIII-B3-2021, 673–678, 2021
https://doi.org/10.5194/isprs-archives-XLIII-B3-2021-673-2021

  29 Jun 2021

29 Jun 2021

DETECTING THE SOURCES OF ICE BLOCK FALLS AT THE MARTIAN NORTH POLAR SCARPS BY ANALYSIS OF MULTI-TEMPORAL HIRISE IMAGERY

S. Su1, L. Fanara1,2, X. Zhang3, K. Gwinner2, E. Hauber2, and J. Oberst1,2 S. Su et al.
  • 1Institute of Geodesy and Geoinformation Science, Technical University of Berlin, Berlin, Germany
  • 2Institute of Planetary Research, DLR, Berlin, Germany
  • 3College of Surveying and Geoinformatics, Tongji University, Shanghai, China

Keywords: Mars, Polar Scarps, Block Falls, HiRISE, Change Detection

Abstract. We have developed a method for automatically detecting the sources of ice block falls at the Martian north polar scarps. Multitemporal red-filter High Resolution Imaging Science Experiment (HiRISE) images were processed by using the open source NASA Ames Stereo Pipeline in combination with the USGS Integrated Software for Imagers and Spectrometers to produce 0.25 m resolution images as well as a 1 m resolution DTM. The multi-temporal HiRISE images were firstly ortho-rectified by the DTM, and then co-registered by using the Enhanced Correlation Coefficient Maximization (ECC) algorithm. We applied the change detection method on the well-aligned sub-meter scale HiRISE images, which were taken in Mars Year 29 and Mars Year 30, to investigate mass wasting at the scarp area centred at 85.0°N, 151.5°E. The idea of the change detection method is to identify changing shadow patterns based on the grayscale difference between the images. The final results show that erosion events occurred at the full length of this study’s scarp within one Mars Year. However, only the upper and lower part of the scarp show erosion activity, whereas the intermediate parts seem inactive, and this correlates with the slope.