嫦娥一号激光测距数据及全月球DEM模型

发布时间：2019-08-07 07:53

【摘要】：激光高度计是搭载在CE-1上的主要载荷之一,用于月球表面的地形测量.2007年11月28日02点22分,激光高度计成功获得第一个探测数据,截止到2008年12月4日,总共获取了约912万个探测数据,数据覆盖全月面.我们利用这些探测数据制作了空间分辨率为3km的全月DEM模型,月表地形地貌特征反映明显,地形细节表达层次分明、清晰可辨.DEM模型的平面定位精度为445m(1σ),高程测量精度为60m(1σ).根据这一DEM模型,测得月球表面最大高差为19.807km,最高点位于Engel’gardt撞击坑东缘(158.656°W,5.441°N,+10.629km),最低点位于Antoniadi撞击坑底部(172.413°W,70.368°S,?9.178km).通过比较,CE-1的激光高度计DEM模型,在精度和分辨率上明显优于美国ULCN2005,与日本SELENE激光高度计DEM模型相当,测量到的最高点与SELEN结果相似,但CE-1数据新发现了比SELEN结果更低的最低点.
[Abstract]:Laser altimeter is one of the main loads on CE-1 and is used in topographic survey of lunar surface. At 02:22 on November 28, 2007, the laser altimeter successfully obtained the first detection data. As of December 4, 2008, a total of about 9.12 million detection data had been obtained, covering the lunar surface. We use these detection data to make a full-month DEM model with spatial resolution 3km. The topographic and geomorphological characteristics of the lunar surface are obviously reflected, the terrain details are clearly expressed, and the terrain details are clearly identifiable. The plane positioning accuracy of Dem model is 445m (1 蟽), and the accuracy of elevation survey is 60m (1 蟽). According to this DEM model, the maximum height difference of lunar surface is 19.807 km, the highest point is located in the eastern edge of Engel'gardt crater (158.656 掳W, 5.441 掳N, 10.629km), and the lowest point is at the bottom of Antoniadi crater (172.413 掳W, 70.368 掳S, 9.178km). By comparison, the accuracy and resolution of CE-1 laser altimeter DEM model is obviously better than that of American ULCN2005, model and Japanese SELENE laser altimeter DEM model, and the highest point measured is similar to that of SELEN, but the lowest point of CE-1 data is lower than that of SELEN.
【作者单位】：中国科学院国家天文台;中国科学院上海技术物理研究所;
【基金】：国家重大专项“绕月探测工程” 国家“863”计划(编号:2008AA12A211)资助
【分类号】：P184.5

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