气候变化领域集成服务门户(CCPortal): Centimeter-resolution topographic modeling and fine-scale analysis of craters and rocks at the Chang'E-4 landing site

CCPortal

DOI	10.1016/j.epsl.2020.116666
	Centimeter-resolution topographic modeling and fine-scale analysis of craters and rocks at the Chang'E-4 landing site
	Wu B.; Li Y.; Liu W.C.; Wang Y.; Li F.; Zhao Y.; Zhang H.
发表日期	2021
ISSN	0012821X
卷号	553
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
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
语种	英语
来源期刊	Earth and Planetary Science Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/203340
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
推荐引用方式 GB/T 7714	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],2021,553.
APA	Wu B..,Li Y..,Liu W.C..,Wang Y..,Li F..,...&Zhang H..(2021).Centimeter-resolution topographic modeling and fine-scale analysis of craters and rocks at the Chang'E-4 landing site.Earth and Planetary Science Letters,553.
MLA	Wu B.,et al."Centimeter-resolution topographic modeling and fine-scale analysis of craters and rocks at the Chang'E-4 landing site".Earth and Planetary Science Letters 553(2021).