A new lunar global DEM derived from Chang'E-1 Laser Altimeter data based on crossover adjustment with local topographic constraint

	A new lunar global DEM derived from Chang'E-1 Laser Altimeter data based on crossover adjustment with local topographic constraint
	Hu, Wenmin 1,2; Di, Kaichang 1; Liu, Zhaoqin 1; Ping, Jinsong3
刊名	PLANETARY AND SPACE SCIENCE
	2013-10-01
卷号	87 页码:173-182
关键词	Lunar Topography DEM Chang'E-1 Laser Altimeter Crossover Analysis Adjustment
英文摘要	This paper presents a crossover adjustment method with local topographic constraint and a new lunar global digital elevation model (DEM) derived from Chang'E-1Laser Altimeter (LAM) data based on the crossover adjustment. With about 9.12 million altimetric points acquired by the LAM, we derived more than 141,000 crossovers that cover the entire lunar surface after eliminating outliers of orbits and altimetric points. The global lunar surface is divided into 32 local blocks, and the least squares adjustment of crossover differences is performed for each block using the local topographic constraint information extracted from the planar areas. Smooth transitions among the neighbouring blocks are ensured through sufficient overlapping areas and virtual control points from the planar areas. After the crossover adjustment, root mean square (RMS) of the residuals is reduced from 149.51 m to 54.75 m after using three parameters for each profile in each block in the mid-latitude region. In polar regions, RMS is reduced from more than 150 m to less than 100 m after using seven parameters for each profile. The resulting lunar global DEM has a significantly improved quality in the local consistencies, i.e. artefacts in the original DEM are eliminated or decreased. The new lunar global DEM is also compared with the laser altimeter data from NASA's LRO mission and JAXA's KAGUYA mission. After comparison, the result shows that the DEMs are consistent and that adjustment does not deform the lunar terrain. (C) 2013 Elsevier Ltd. All rights reserved.
收录类别	SCI
语种	英语
WOS记录号	WOS:000327810100016
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/5820]
专题	国家天文台_月球与深空探测研究部
作者单位	1.Chinese Acad Sci, Inst Remote Sensing Applicat, State Key Lab Remote Sensing Sci, Beijing 100101, Peoples R China 2.China Univ Min & Technol, IOT Percept Mine Res Ctr, Xuzhou 221008, Peoples R China 3.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
推荐引用方式 GB/T 7714	Hu, Wenmin,Di, Kaichang,Liu, Zhaoqin,et al. A new lunar global DEM derived from Chang'E-1 Laser Altimeter data based on crossover adjustment with local topographic constraint[J]. PLANETARY AND SPACE SCIENCE,2013,87:173-182.
APA	Hu, Wenmin,Di, Kaichang,Liu, Zhaoqin,&Ping, Jinsong.(2013).A new lunar global DEM derived from Chang'E-1 Laser Altimeter data based on crossover adjustment with local topographic constraint.PLANETARY AND SPACE SCIENCE,87,173-182.
MLA	Hu, Wenmin,et al."A new lunar global DEM derived from Chang'E-1 Laser Altimeter data based on crossover adjustment with local topographic constraint".PLANETARY AND SPACE SCIENCE 87(2013):173-182.