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科学通报  2015 

基于LRONAC影像的嫦娥三号着陆点高精度定位与精度验证

DOI: 10.1360/N972015-00336, PP. 2750-2757

Keywords: 嫦娥三号,着陆点定位,LRO,NAC,月球激光测距,控制网

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Abstract:

嫦娥三号(CE-3)着陆器的高精度定位具有重要的工程意义和科学应用价值.本文研究基于美国月球侦察轨道器(lunarreconnaissanceorbiter,LRO)窄角相机(narrowanglecamera,NAC)高分辨率月球遥感影像进行CE-3着陆点高精度定位的方法,并利用月面绝对控制点进行精度验证.收集历年来CE-3号着陆区和月球表面棱镜点的LRONAC数据,利用精化后的轨道、姿态及相机参数等数据建立LRONAC的严密成像几何模型,通过严密成像几何模型的初始点位预测、人工量测和高精度匹配等方式,获取影像上着陆点和月面激光测距反射棱镜点的影像坐标.用DEM辅助单像测图方法分别对CE-3着陆点和各棱镜标志点进行定位解算,将棱镜点的定位结果与地面观测的高精度定位值对比进行精度评价.利用本文方法,得到CE-3着陆点定位坐标为北纬44.1219°,西经19.5113°.

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