Geospatial technologies for Chang’e-3 and Chang’e-4 lunar rover missions |
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Authors: | Kaichang Di Zhaoqin Liu Wenhui Wan Man Peng Bin Liu Yexin Wang |
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Institution: | 1. State Key Laboratory of Remote Sensing Science, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing, Chinadikc@radi.ac.cnhttps://orcid.org/0000-0001-6581-6615;3. State Key Laboratory of Remote Sensing Science, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing, China |
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Abstract: | ABSTRACTThis paper presents a brief overview of the geospatial technologies developed and applied in Chang’e-3 and Chang’e-4 lunar rover missions. Photogrammetric mapping techniques were used to produce topographic products of the landing site with meter level resolution using orbital images before landing, and to produce centimeter-resolution topographic products in near real-time after landing. Visual positioning techniques were used to determine the locations of the two landers using descent images and orbital basemaps immediately after landing. During surface operations, visual-positioning-based rover localization was performed routinely at each waypoint using Navcam images. The topographic analysis and rover localization results directly supported waypoint-to-waypoint path planning, science target selection and scientific investigations. A GIS-based digital cartography system was also developed to support rover teleoperation. |
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Keywords: | Geospatial technology lunar rover landing site mapping topographic analysis rover localization and navigation |
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