Volume 41 Issue 2
Mar.  2021
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Article Navigation >  Chinese Journal of Space Science  > 2021  >  41(2): 320-328
WANG Jia, XIN Xin, WAN Wenhui, CUI Xiaofeng, RONG Zhifei, YOU Yi, HE Ximing. Location and Accuracy Validation of Lunar Landing Point Based on Multi-source Imagesormalsize[J]. Chinese Journal of Space Science, 2021, 41(2): 320-328. doi: 10.11728/cjss2021.02.320
Citation: WANG Jia, XIN Xin, WAN Wenhui, CUI Xiaofeng, RONG Zhifei, YOU Yi, HE Ximing. Location and Accuracy Validation of Lunar Landing Point Based on Multi-source Imagesormalsize[J]. Chinese Journal of Space Science, 2021, 41(2): 320-328. doi: 10.11728/cjss2021.02.320
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Location and Accuracy Validation of Lunar Landing Point Based on Multi-source Imagesormalsize

doi: 10.11728/cjss2021.02.320

  • 1 Beijing Aerospace Control Center, Beijing 100094;

  • 2 State Key Laboratory of Remote Sensing Science, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100101

  • Received Date: 2019-11-18
  • Rev Recd Date: 2020-10-20
  • Publish Date: 2021-03-15
    Abstract
  • High-precision positioning of the landing site is a critical step in the mission and an important prerequisite for surface operations of the lander and rover. In this paper, a high-precision positioning method of the landing site was designed based on image feature matching and multiple image localization methods. And the positioning experiment and accuracy validation were carried out in Chang'E-3 landing site. On the basis of high-precision image matching and geometric transformation, the matching precision between the sequent descent images reached sub-pixel, and the matching accuracy between LRO NAC image and medium-resolution descent image was better than 1 pixel. The landing position was calculated to be (44.1196°N, 19.5148°W). This method comprehensively utilized multi-source images, and didn't entirely depend on the mapping accuracy of the landing base map. It was a further refinement of the matching results between the images and landing base map. So, this high-precision positioning method can be applied in future deep space exploration missions.

     

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