雷达科学与技术2025，Vol.23Issue(5)：569-576,590,9.DOI:10.3969/j.issn.1672-2337.2025.05.011
SHARAD和RoPeR的火星乌托邦平原南部介电常数反演研究
Permittivity Map of the Southern Utopia Planitia on Mars Inverted from SHARAD and RoPeR
摘要
Abstract
Radar is a crucial tool for detecting subsurface structures and properties on Mars.The shallow radar(SHARAD)aboard the Mars reconnaissance orbiter(MRO)has conducted almost comprehensive orbital surveys of Mars over the past two decades,which provides a lot of valuable data for detection of Mars.However,the current research on the inversion and interpretation of SHARAD data mainly focuses on the part containing subsurface reflec-tion,and the surface reflection data,which accounts for the largest proportion,has not been fully utilized.In 2021,the US"Perseverance"rover and China's"Zhurong"rover successfully landed in Jezero Crater and southern Utopia Plani-tia,respectively.Both rovers were equipped with ground-penetrating radar systems and collected a large amount of data,providing crucial references for calibrating SHARAD surface reflection data.Firstly,the SHARAD data is processed to eliminate the influence of ionosphere interference,satellite attitude and ground roughness.Then,the low-frequency channel radar data from Mars rover penetrating radar(RoPeR)on"Zhurong"rover are processed and inverted to cali-brate the surface reflection power of SHARAD data.Finally,a permittivity distribution map of the southern Utopia Plani-tia is generated based on the processed SHARAD surface reflection power.The results indicate that the permittivity map in southern Utopia Planitia is relatively uniform,ranging from 3.5 to 4.5,but the permittivity values in the southern high-land are slightly higher than those in the northern lowland.A data processing and inversion method by combining SHA-RAD and RoPeR is proposed in this study,which can help improve the large-scale data processing and interpretation capabilities of Mars radar and enhance the understanding of Mars surface properties and evolution history.关键词
火星/SHARAD雷达/火星次表层探测雷达/反演/介电常数Key words
Mars/SHARAD/RoPeR/inversion/permittivity分类
电子信息工程引用本文复制引用
段迪文,孟旭,刘海,李鉴辉,刘超,王向宇..SHARAD和RoPeR的火星乌托邦平原南部介电常数反演研究[J].雷达科学与技术,2025,23(5):569-576,590,9.基金项目
国家自然科学基金(No.52179126,52379099) （No.52179126,52379099）
广东省基础与应用基础研究基金项目(No.2024A1515010934) （No.2024A1515010934）
