高级检索
柳钮滔, 施贤正, 徐丰, 金亚秋. 月球永久阴影区着陆点选取要求的高分辨率极化SAR数据分析[J]. 深空探测学报(中英文), 2022, 9(1): 42-52. DOI: 10.15982/j.issn.2096-9287.2022.20210134
引用本文: 柳钮滔, 施贤正, 徐丰, 金亚秋. 月球永久阴影区着陆点选取要求的高分辨率极化SAR数据分析[J]. 深空探测学报(中英文), 2022, 9(1): 42-52. DOI: 10.15982/j.issn.2096-9287.2022.20210134
LIU Niutao, SHI Xianzheng, XU Feng, JIN Yaqiu. Analysis of High Resolution SAR Data and Selection of Landing Sites in the Permanently Shadowed Region on the Moon[J]. Journal of Deep Space Exploration, 2022, 9(1): 42-52. DOI: 10.15982/j.issn.2096-9287.2022.20210134
Citation: LIU Niutao, SHI Xianzheng, XU Feng, JIN Yaqiu. Analysis of High Resolution SAR Data and Selection of Landing Sites in the Permanently Shadowed Region on the Moon[J]. Journal of Deep Space Exploration, 2022, 9(1): 42-52. DOI: 10.15982/j.issn.2096-9287.2022.20210134

月球永久阴影区着陆点选取要求的高分辨率极化SAR数据分析

Analysis of High Resolution SAR Data and Selection of Landing Sites in the Permanently Shadowed Region on the Moon

  • 摘要: 月球两极永久阴影区(Permanently Shadowed Regions,PSR)全年没有直接光照,搜寻PSR内的月球水冰是“嫦娥七号”的主要任务之一。人类至今没有在PSR着陆,中国的“嫦娥七号”任务计划在PSR附近的太阳直射区域登陆,着陆器上携带的飞跃器将进入PSR进行采样与分析。如何选择登月点和取样点是该项任务的一个关键,结合高精度的数字高程模型,“嫦娥七号”卫星搭载的极化合成孔径雷达(Polarization Synthetic Aperture Radar,Pol-SAR)可以进一步确定月表面的高低起伏状态,以确定平缓表面的登月点与采样点,及小飞跃器的飞行路线。通过将美国“月球轨道勘测器”(Lunar Reconnaissance Orbiter,LRO)上面的微型雷达Mini-RF采集的雷达图像与太阳直射区域光学图像对比,以希吉努斯(Hyginus)陨石坑附近区域和“嫦娥四号”着陆区为例,来分析Pol-SAR在筛选平坦表面作为登月点与采样点时的作用。率先将HRNet网络应用于月球SAR图像分割,并讨论了人工神经网络在探月SAR图像信息获取中的应用。以月球南极的舒梅克(Shoemaker)陨石坑和沙克尔顿(Shackleton)陨石坑为例,找出永久阴影区平坦的区域,作为“嫦娥七号”SAR探测的方法参考。

     

    Abstract: There is no direct solar illumination in the permanently shadowed regions (PSR) at the polar region of the Moon. Detecting water-ice in PSR is a significant scientific question. Until now, no spacecraft has landed in PSR. Chang’E-7 mission plans a rover landing at the solar illuminated region near PSR. A mini-flyer carried by the lander will fly to the PSR to collect regolith samples for analysis. Selection of landing site and sampling site is critical for the mission. The Polarization Synthetic Aperture Radar (Pol-SAR) onboard Chang’E-7 satellite can evaluate the roughness of lunar surface, the landing site, the sampling site and the flying trajectory with the assistance of high-resolution digital elevation model. By comparing the SAR data acquired by the Mini-RF onboard Lunar Reconnaissance Orbiter with the optical images at the solar illuminated region, we analyze the role that Pol-SAR play in selecting the flat landing site and sampling site. Regions near Hyginus crater and the landing site of Chang’E-4 mission are taken as examples. HRNet is used in lunar SAR image segmentation. The application of neutral network in lunar SAR image segmentation is discussed. Craters Shoemaker and Shackleton at lunar south pole are analyzed to find flat surface in PSR as potential landing sites. This paper provides a reliable reference for SAR detection in Chang’E-7 mission.

     

/

返回文章
返回