Along-track Calibration of the Zhurong Rover Magnetometer  

作　　者：Hao LUO Aimin DU Yasong GE Ying ZHANG Haiying LI Lin TIAN Kuixiang ZHANG Shuquan SUN Lin ZHAO Zhi LI Xiao FENG 

机构地区：[1]CAS Engineering Laboratory for Deep Resources Equipment and Technology,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing,100029,China [2]College of Earth Science,University of Chinese Academy of Sciences,Beijing,100049,China [3]National Astronomical Observatories,Chinese Academy of Sciences,Beijing,100101,China

出　　处：《Science China Earth Sciences》2024年第2期552-565,共14页中国科学（地球科学英文版）

基　　金：supported by the Strategic Priority Research Program of Chinese Academy of Sciences(Grant No.XDB41010304);the National Natural Science Foundation of China(Grant Nos.42374217,42274224);the National Key R&D Program of China(Grant No.2022YFF0503200);the Key Research Program of the Chinese Academy of Sciences(Grant No.ZDBS-SSW-TLC001);the Key Research Programs of the Institute of Geology and Geophysics,Chinese Academy of Sciences(Grant No.IGGCAS-202102)。

摘　　要：As part of the Chinese Tianwen-1 mission,the Zhurong Rover began its scientific investigation in the southern Utopia Planitia after its successful landing in 15 May,2021.The Zhurong Rover magnetometer(RoMAG),one of the six payloads onboard the rover,includes two identical high-sensitivity triaxial fluxgate magnetometers and can implement mobile magnetic measurements on the surface of Mars.Although a rover magnetic compensation procedure was conducted to remove the magnetic interferences pre-launch,due to the different state of the payloads and electric power system such as the solar panel,an along-track calibration of the magnetometer is necessary to obtain a more accurate Martian magnetic field.Two methods,mast yaw rotations and Rover yaw rotations were utilized separately to determine the Martian horizontal magnetic components.Results show that the Martian horizontal magnetic components determined by the two methods are in good agreement,with the root mean square deviation less than 2.0 nT.The vertical component was also constrained through the pitch movements of the mast by assuming the interferences field distributes like a dipole field.A linear correlation between magnetic field measurements and the solar array currents was derived to calibrate the body field during the regular exploration.We conclude that more accurate measurements could be made when applying the calibration results in the magnetic survey on the surface of Mars.

关 键 词：The Zhurong Rover MAGNETOMETER Along-track calibration Remnant magnetization 

分 类 号：V476.4[航空宇航科学与技术—飞行器设计] P185.3[天文地球—天文学]