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Along-track calibration of the zhurong rover magnetometer

Urheber*innen

Aimin,  Du
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Luo,  Hao
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Ge,  Yasong
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Zhang,  Ying
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Tian,  Lin
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Zhang,  Kuixiang
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

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Zitation

Aimin, D., Luo, H., Ge, Y., Zhang, Y., Tian, L., Zhang, K. (2023): Along-track calibration of the zhurong rover magnetometer, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-2139


Zitierlink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5018657
Zusammenfassung
Two identical high-sensitivity triaxial Rover fluxgate magnetometers (RoMag) are mounted on Zhurong Rover to detect the surface magnetic field on Mars. Although a rover magnetic compensation procedure was conducted to remove the magnetic interferences pre-launch [Du et al., 2020], 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. With efforts from the Zhurong Rover engineering team, 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 ~ 2.0 nT. The vertical component was also constrained through the pitch movements of the mast when 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.