The Chinese Mars ROVER Fluxgate Magnetometers
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The Chinese Mars ROVER Fluxgate Magnetometers A.M. Du1,2,3 · Y. Zhang1,2 · H.Y. Li4 · D.H. Qiao5 · Z. Yi6 · T.L. Zhang7,8 · L.F. Meng6 · Y.S. Ge1,2 · H. Luo1,2 · L. Zhao1,2 · S.Q. Sun1,2 · J.M. Ou1,2,3 · Z. Li1,2 · X. Feng1,2 · J.L. Dai6
Received: 9 June 2020 / Accepted: 9 November 2020 © Springer Nature B.V. 2020
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 ±65000 nT. The sample rate is up to 32 Hz and the noise is 0.01 nT/ 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. Keywords Mars · Magnetic field · Magnetometer · Rover · Calibration The Huoxing-1 (HX-1) / Tianwen-1 (TW-1) mission to Mars Edited by Chunlai Li and Jianjun Liu
B Y. Zhang
[email protected]
1
Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, 100029, China
2
College of Earth Science, University of Chinese Academy of Sciences, Beijing, China
3
State Key Laboratory of Lunar and Planetary Sciences, Macau University of Science and Technology, Macau, China
4
National Astronomical Observatories, Chinese Academy of Sciences, Beijing, 100101, China
5
School of Electronic and Information Engineering, Soochow University, Soochow, China
6
Beijing Institute of Spacecraft Environment Engineering, Beijing, 100094, China
7
CAS Center for Excellence in Comparative Planetology, Hefei, 230026, China
8
Space Research Institute, Austrian Academy of Sciences, Graz, Austria
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A.M. Du et al.
Table 1 The missions of Martian magnetic field measurement No. Mission
Country/ Launch Instrument region time
Sampling rates
Range/resolution
Installation location
0.9 s; 1.5 s; 2.4 s
±320 nT/0.35 nT
On a boom
1
Mariner 4 USA
1964
Helium vector magnetometer
2
Mars 2
USSR
1971
Triaxial fluxgate 1 min magnetometer
±60 nT/1 nT
On a boom
3
Mars 3
USSR
1971
Triaxial fluxgate 1 min magnetometer
±60 nT/1 nT
On a boom
4
Mars 5
USSR
1973
Triaxial fluxgate 1 min magnetometer
±60 nT/1 nT
On a boom
5
Phobos 2
USSR
1988
Two Triaxial fluxgate magnetometer
1.5 s; 2.4 s; 40 s; 600 s;
±100 nT/0.05 nT
At the end of Solar array
6
MGS
USA
1996
Two Triaxial fluxgate magnetometer
At the tips of 1/8 s; 1/16 s; ±4 nT/0.00
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