Abstract
The Mars Rover Magnetometers (RoMAG) will implement the first mobile magnetic field measurements on the surface of Mars. Two identical tri-axial fluxgate magnetometer sensors are mounted at the top and bottom of the mast of rover, respectively. The technology of Helmholtz compensation coil probe and digital closed-loop feedback circuit is utilized to realize high precision measurement. Each magnetometer measures the vector magnetic field with a resolution of 0.01 nT in the range of \(\pm65000~\text{nT}\). The sample rate is up to 32 Hz and the noise is \(0.01~\text{nT}/\surd\text{Hz}\) @1 Hz. A rover magnetic compensation procedure was conducted to remove the most important magnetic disturbances. Mobile magnetic field measurements on the Martian surface would obtain fine-scale crust field and provide information about its remnant magnetization and any possible intrinsic magnetic field. It would help us to further understand Martian internal structure, coupling processes of solar wind-magnetosphere-ionosphere.
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Acknowledgements
This work is supported by the Strategic Priority Research Program of Chinese Academy of Sciences (Grant No. XDB41010304), Beijing Municipal Science and Technology Commission (Grant No. Z191100004319001), the pre-research Project on Civil Aerospace Technologies No. D020103 funded by CNSA, and the National Natural Science Foundation of China (41874080, 41674168, 41874197).
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The Huoxing-1 (HX-1) / Tianwen-1 (TW-1) mission to Mars
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Du, A.M., Zhang, Y., Li, H.Y. et al. The Chinese Mars ROVER Fluxgate Magnetometers. Space Sci Rev 216, 135 (2020). https://doi.org/10.1007/s11214-020-00766-8
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DOI: https://doi.org/10.1007/s11214-020-00766-8