Journal
SPACE SCIENCE REVIEWS
Volume 216, Issue 8, Pages -Publisher
SPRINGER
DOI: 10.1007/s11214-020-00766-8
Keywords
Mars; Magnetic field; Magnetometer; Rover; Calibration
Categories
Funding
- Strategic Priority Research Program of Chinese Academy of Sciences [XDB41010304]
- Beijing Municipal Science and Technology Commission [Z191100004319001]
- pre-research Project on Civil Aerospace Technologies - CNSA [D020103]
- National Natural Science Foundation of China [41874080, 41674168, 41874197]
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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 +/- 65000nT. The sample rate is up to 32 Hz and the noise is 0.01 nT/root 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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