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Title: Comparison and co-registration of DEMs generated from HiRISE and CTX images
Authors: Wang, Y
Wu, BO 
Keywords: Mars
Issue Date: 2016
Publisher: Copernicus GmbH
Source: International archives of the photogrammetry, remote sensing and spatial information sciences, 2016, v. XLI-B4, p. 511-517 How to cite?
Journal: International archives of the photogrammetry, remote sensing and spatial information sciences 
Abstract: Images from two sensors, the High-Resolution Imaging Science Experiment (HiRISE) and the Context Camera (CTX), both on-board the Mars Reconnaissance Orbiter (MRO), were used to generate high-quality DEMs (Digital Elevation Models) of the Martian surface. However, there were discrepancies between the DEMs generated from the images acquired by these two sensors due to various reasons, such as variations in boresight alignment between the two sensors during the flight in the complex environment. This paper presents a systematic investigation of the discrepancies between the DEMs generated from the HiRISE and CTX images. A combined adjustment algorithm is presented for the co-registration of HiRISE and CTX DEMs. Experimental analysis was carried out using the HiRISE and CTX images collected at the Mars Rover landing site and several other typical regions. The results indicated that there were systematic offsets between the HiRISE and CTX DEMs in the longitude and latitude directions. However, the offset in the altitude was less obvious. After combined adjustment, the offsets were eliminated and the HiRISE and CTX DEMs were co-registered to each other. The presented research is of significance for the synergistic use of HiRISE and CTX images for precision Mars topographic mapping.
Description: XXIII International Congress for Photogrammetry and Remote Sensing (ISPRS Congress), Commission IV, Prague, Czech Republic, 12–19 July 2016
ISSN: 1682-1750
EISSN: 2194-9034
DOI: 10.5194/isprs-archives-XLI-B4-511-2016
Appears in Collections:Conference Paper

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