嫦娥六号着陆点高精度视觉定位
High-precision visual localization of the Chang'e-6 lander
刘召芹 1彭嫚 1邸凯昌 1万文辉 1刘斌 1王晔昕 1谢彬 2寇玉珂 2王彪 2赵晨旭 2张一凡2
作者信息
- 1. 中国科学院空天信息创新研究院遥感与数字地球重点实验室,北京 100101
- 2. 中国科学院空天信息创新研究院遥感与数字地球重点实验室,北京 100101;中国科学院大学,北京 100049
- 折叠
摘要
嫦娥六号着陆点的精确定位对于工程任务顺利实施和科学研究至关重要.本文基于嫦娥二号正射影像、月球勘测轨道器窄角相机正射影像、嫦娥六号降落相机图像等数据,利用图像仿真和特征匹配方法确定了嫦娥六号着陆点在嫦娥二号正射影像的精确位置为(153.9780°W,41.6252°S),同时确定了在LROC NAC正射影像中的精确位置.嫦娥六号着陆点精确定位结果直接支持了工程任务的实施,对于结合着陆区高精度地形和嫦娥六号样品深入开展着陆区科学研究具有重要支撑作用.
Abstract
China's Chang'e-6(CE-6),the world's first lunar farside sample-return mission,successfully landed on the preselected landing site in the Apollo basin inside the South Pole-Aitken basin on June 2,2024.The high-precision localization of the lander is of considerable importance for supporting engineering operations and scientific studies of the landing site and the returned samples.This study presents the localization techniques and results of the CE-6 lander.Using the Digital Orthophoto Maps(DOMs)produced from images taken by Chang'e-2(CE-2)and the Lunar Reconnaissance Orbiter Camera(LROC)Narrow Angle Camera(NAC)as base maps,the CE-6 lander has been lo-calized through a visual localization method based on image feature matching between descent images acquired by the lander and the base maps.A new descent image simulation technique has been developed based on orbital base maps and terrain data before landing to automate image matching between descent images and orbital base maps.After landing,descent images are downlinked and lander localization is per-formed using the developed visual localization method.The location of the CE-6 lander location is determined to be(153.9780°W,41.6252°S)on the CE-2 base map and(153.9855°W,41.6384°S)on an LROC NAC base map(Image ID:M166854798LE).The average location of the lander from five LROC NAC base maps is(153.9856°W,41.6383°S).The location of the high-precision CE-6 lander has been directly sup-ported by engineering operations,and it will be valuable for comprehensive studies on the landing site by using remote sensing data and studies on the provenance of the samples.
关键词
遥感/嫦娥六号/视觉定位/降落相机图像/图像仿真/图像匹配Key words
remote sensing/Chang'e-6/lander localization/descent camera image/image simulation/image matching引用本文复制引用
基金项目
国家重点研发计划(2022YFF0503100)
出版年
2024
NETL
NSTL
万方数据