摘要
我国于2018年12月8日发射嫦娥四号月球探测器,实施世界上首次月球背面软着陆和巡视探测.探测器着陆点的快速高精度定位是其中的一个重要技术环节,也是着陆器和巡视器开展月面探测工作的重要前提.本文基于高精度图像匹配和几何变换方法,结合实际工程任务需求,首先利用探测器动力下降期间的近实时高压缩比降落序列影像完成了着陆点的快速初始定位;其次利用回放的低压缩比降落影像对该位置进行了精化,最终解算的嫦娥四号探测器着陆点位置为(177.5884°E, 45.4565°S).该定位方法及结果被成功应用于实际工程任务中,为嫦娥四号任务着陆区的地形分析及后续遥操作的任务规划提供了重要支持.
On December 8, 2018, China launched the Chang’E-4 lunar probe and implemented soft landing and patrol exploration on the lunar farside for the first time. Fast and high-precision positioning of the landing point is a critical step of the mission, and also an important prerequisite for surface operations of the lander and rover. Based on the high-precision image matching and geometric transformation methods, and considering the engineering requirements, the landing point location of the Chang’E-4 lander was initially determined using the near real-time high compression ratio descent sequence images. Then, the position was refined using the replayed low compression ratio descent images, and the landing point position was calculated to be(177.5884°E, 45.4565°S). The landing point localization method and result have been successfully applied to actual engineering tasks for the first time in China, thus providing important support to the topographic analysis of the landing area and mission planning of the follow-up teleoperations.
作者
王镓
吴伟仁
李剑
邸凯昌
万文辉
谢剑锋
彭嫚
王保丰
刘斌
贾萌娜
席露华
赵瑞
WANG Jia;WU WeiRen;LI Jian;DI KaiChang;WAN WenHui;XIE JianFeng;PENG Man;WANG BaoFeng;LIU Bin;JIA MengNa;XI LuHua;ZHAO Rui(Beijing Aerospace Control Center,Beijing 100094,China;National Key Laboratory of Science and Technology on Aerospace Flight Dynamics,Beijing 100094,China;Lunar Exploration and Space Engineering Center,Beijing 100037,China;State Key Laboratory of Remote Sensing Science,Institute of Remote Sensing and Digital Earth,Chinese Academy of Sciences,Beijing 100101,China)
出处
《中国科学：技术科学》
EI
CSCD
北大核心
2020年第1期41-53,共13页
Scientia Sinica(Technologica)
基金
国家自然科学基金(批准号:41771488,41671458,11773004,61573049)资助项目.
