The Mars orbiter magnetometer of Tianwen-1:in-flight performance and first science results  

作　　者：YuMing Wang TieLong Zhang GuoQiang Wang SuDong Xiao ZhuXuan Zou Long Cheng ZongHao Pan Kai Liu XinJun Hao YiRen Li ManMing Chen ZhouBin Zhang Wei Yan ZhenPeng Su ZhiYong Wu ChengLong Shen YuTian Chi MengJiao Xu JingNan Guo Yang Du 

机构地区：[1]School of Earth and Space Sciences/Deep Space Exploration Laboratory,University of Science and Technology of China,Hefei 230026,China [2]CAS Center for Excellence in Comparative Planetology/CAS Key Laboratory of Geospace Environment/Mengcheng National Geophysical Observatory,University of Science and Technology of China,Hefei 230026,China [3]Space Research Institute,Austrian Academy of Sciences,Graz,Austria [4]Institute of Space Science and Applied Technology,Harbin Institute of Technology,Shenzhen 518055,China [5]National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100012,China [6]Institute of Deep Space Sciences,Deep Space Exploration Laboratory,Hefei 230026,China [7]Shanghai Institute of Satellite Engineering,Shanghai 201109,China

出　　处：《Earth and Planetary Physics》2023年第2期216-228,共13页地球与行星物理（英文版）

基　　金：supported by the NSFC(Grant Nos 42130204 and 42188101);the Strategic Priority Program of the Chinese Academy of Sciences(Grant No.XDB41000000);the support of the Tencent Foundation.

摘　　要：The Mars Orbiter MAGnetometer(MOMAG)is a scientific instrument onboard the orbiter of China’s first mission for Mars—Tianwen-1.Since November 13,2021,it has been recording magnetic field data from the solar wind to the magnetic pile-up region surrounding Mars.Here we present its in-flight performance and first science results,based on its first one and one-half months’data.Comparing these early MOMAG observations to the magnetic field data in the solar wind from NASA’s Mars Atmosphere and Volatile EvolutioN(MAVEN)mission,we report that the MOMAG magnetic field data are at the same level in magnitude,and describe the same magnetic structures with similar variations in three components.We recognize 158 clear bow shock(BS)crossings in these MOMAG data;their locations match well statistically with the modeled average BS.We also identify and compare five pairs of datasets collected when Tianwen-1’s orbiter and the MAVEN probe made simultaneous BS crossings.These BS crossings confirm the global shape of modeled BS,as well as the south-north asymmetry of the Martian BS.Two cases presented in this paper suggest that the BS is probably more dynamic at flank than near the nose.So far,MOMAG performs well,and provides accurate magnetic field vectors.MOMAG is continuously scanning the magnetic field surrounding Mars.Data from MOMAG’s measurements complement data from MAVEN and will undoubt edly advance our understanding of the plasma environment of Mars.

关 键 词：MARS magnetic field Tianwen-1 magnetometer bow shock 

分 类 号：V476.4[航空宇航科学与技术—飞行器设计]