“天问一号”着陆区地貌解译与定量分析  

Martian Landing Area Morphology Interpretation and Quantitative Analysis of the Zhurong Rover

作　　者：刘佳 刘斌 邸凯昌 岳宗玉[2,3] 于天一 王镓[4] 芶盛[2] LIU Jia;LIU Bin;DI Kaichang;YUE Zongyu;YU Tianyi;WANG Jia;GOU Sheng(State Key Laboratory of Space Weather,National Space Science Center,Chinese Academy of Sciences,Beijing 100190,China;State Key Laboratory of Remote Sensing Science,Aerospace Information Research Institute,Chinese Academy of Sciences,Beijing 100101,China;Center for Excellence in Comparative Planetology,Chinese Academy of Sciences,Hefei 230026,China;Beijing Aerospace Control Center(BACC),Beijing 100094,China)

机构地区：[1]中国科学院国家空间科学中心天气学国家重点实验室,北京100190 [2]中国科学院空天信息创新研究院遥感科学国家重点实验室,北京100101 [3]中国科学院比较行星学卓越创新中心,合肥230026 [4]北京航天飞行控制中心,北京100094

出　　处：《深空探测学报（中英文）》2022年第3期329-337,共9页Journal Of Deep Space Exploration

基　　金：国家自然科学基金(41771490,42172265)。

摘　　要：利用火星5 m分辨率的火星背景相机数字正摄影像图(Context Camera Digital Orthophoto Map,CTX DOM)及“天问一号”轨道器获取的高分影像数字高程模型(Digital Elevation Model,DEM)产品数据,在以着陆区点为中心的20×20 km^(2)范围内,对“天问一号”着陆点附近的撞击坑分布密度、撞击坑的深度、深径比等进行定量分析,着重从火星车着陆区的撞击地貌入手,对着陆区的地质背景进行解译分析研究,结果表明:着陆点周边20 km范围内,除了包含大规模的小型撞击坑以及大量的横向风成脊外,还存在很多凹锥、构造脊和沟槽;火星着陆区表面的撞击坑大部分是二次坑或是已退化的撞击坑,深径比介于0.001~0.136之间。研究对着陆区地质地貌特征的深入分析,可为乌托邦平原(Utopia Planitia)的地质演化历史研究提供支撑。Tianwen-1 lander and rover successfully landed in the southern Utopia Planitia of Mars on May 15,2021.As China’s first Mars exploration mission,Tianwen-1 achieved orbiting,landing and patrolling tasks in one mission.In this paper,we apply the photogrammetry methods to produce mapping products from high-resolution orbiter remote sensing images,and to analyze the landing area environment.The environment of the landing area is not only important for the path planning and safe driving of the Mars rover,but also provides fundamental information for science research.Mainly focuses on the Tianwen-1 landing area(within the surrounding 20 km of the landing point),and utilizes the 5 m/pixel CTX DOM and Tianwen-1 DEM product data to quantitatively analysis the impact crater density,impact crater depth,depth-to-diameter ratio,etc.Further interpretation and analysis of the geomorphic feature and geological background of the landing area are conducted.The results show that there are many small craters,transverse aeolian ridge,pitted cones,structural ridges and throughs in the region,most of the impact craters on the surface of the landing area are secondary craters or degraded impact craters,with an aspect ratio between 0.001 to 0.136.In addition to in-depth analysis of the geological and geomorphological features of the landing area,the crater statistics and geomorphic feature analysis are valuable for geological evolution study of the Utopia Planitia.

关 键 词："祝融号"火星车 着陆区 高分影像 撞击坑 

分 类 号：P237[天文地球—摄影测量与遥感]