DOI: 10.1016/j.epsl.2020.116666
论文题名: Centimeter-resolution topographic modeling and fine-scale analysis of craters and rocks at the Chang'E-4 landing site
作者: Wu B. ; Li Y. ; Liu W.C. ; Wang Y. ; Li F. ; Zhao Y. ; Zhang H.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2021
卷: 553 语种: 英语
中文关键词: Chang'E-4
; craters
; Pancam
; photoclinometry
; photogrammetry
; rocks
英文关键词: 3D modeling
; Lunar missions
; Orbits
; Rocks
; Silicate minerals
; Statistics
; Stereo image processing
; Surveying
; Crater population
; Digital elevation model
; In-situ observations
; Joint analysis
; Panoramic cameras
; Size-frequency distributions
; Spatial resolution
; Topographic models
; Landing
; Chang'e
; crater
; digital elevation model
; Moon
; orthophoto
; photogrammetry
; rock
; spatial resolution
; stereo image
; topography
; Oryctolagus cuniculus
英文摘要: Chang'E-4 was the first lunar mission to successfully land on the far side of the Moon. The stereo images collected by the panoramic camera (Pancam) mounted on the Jade Rabbit-2 rover have provided the most detailed in situ observations of the landing site along the rover traverse. This paper presents our efforts in centimeter-resolution topographic modeling and fine-scale analysis of craters and rocks at the Chang'E-4 landing site using the Pancam images. We first used an integrated photogrammetric and photoclinometric approach to generate a digital elevation model (DEM) and an orthoimage mosaic of the landing site and a 3D model of the Chang'E-4 lander itself, all with spatial resolutions of 1 cm/pixel. Craters with diameters of decimeters to meters and rocks with sizes of decimeters were then extracted and analyzed. The results indicate that Chang'E-4 landed on a terrain slope of 4° toward 72.3° southwest, with one foot sunk in the regolith 1.5 cm deeper than the other foot on the front side of the lander. Fine-scale analysis of the small craters at the Chang'E-4 landing site showed overall a similar power-law trend as large craters of hundreds of meters, but there is a clear gap between their size-frequency distributions, indicating the accumulated impact flux appears to be different for these two crater populations. The average depth-to-diameter ratio of the small craters around the landing site was 0.061, obviously less than those of craters on the kilometer scale. Fine-scale analysis of rocks revealed that the Chang'E-4 landing site has a rock abundance of 0.21%, which agrees well with previous results based on orbital data. Joint analysis of craters and rocks indicates that more rocks are located inside craters with greater depth-to-diameter ratios on such a fine scale. The 3D topographic modeling approach and fine-scale analysis of craters and rocks presented in this paper provide new insights into lunar mapping and geological study. © 2020 The Authors Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/165718
Appears in Collections: 气候变化与战略
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作者单位: Department of Land Surveying and Geo-Informatics, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong; China Academy of Space Technology, 104 Youyi Street, Haidian, Beijing, China
Recommended Citation:
Wu B.,Li Y.,Liu W.C.,et al. Centimeter-resolution topographic modeling and fine-scale analysis of craters and rocks at the Chang'E-4 landing site[J]. Earth and Planetary Science Letters,2021-01-01,553