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Along-track Calibration of the Zhurong Rover Magnetometer

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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.

The Zhurong RoverMagnetometerAlong-track calibrationRemnant magnetization

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

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CAS Engineering Laboratory for Deep Resources Equipment and Technology,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China

College of Earth Science,University of Chinese Academy of Sciences,Beijing 100049,China

National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100101,China

Strategic Priority Research Program of Chinese Academy of SciencesNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Key R&D Program of ChinaKey Research Program of the Chinese Academy of SciencesKey Research Programs of the Institute of Geology and Geophysics,Chinese Academy of Sciences

XDB4101030442374217422742242022YFF0503200ZDBS-SSW-TLC001IGGCAS-202102

2024

10.1007/s11430-023-1213-1

中国科学:地球科学(英文版)
中国科学院

中国科学:地球科学(英文版)

影响因子：1.002
ISSN：1674-7313
年,卷(期)：2024.67(2)
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