Automatic calculation of the magnetometer zero offset using the interplanetary magnetic field  based on the Wang–Pan method

Hu, Xiaowen; Wang, Guoqiang; Pan, Zihan

doi:10.26464/epp2022017

Cited by 2 publications

(2 citation statements)

References 22 publications

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“…To test whether the zero offset determined by the Wang method II is reliable or not, we compare it to the zero offset determined by the Wang‐Pan method I. The calculation procedure of the Wang‐Pan method I follows the procedure proposed by Hu, Wang, Pan, and Pan (2022). The fluctuation event is considered to be a potential Alfvénic fluctuation event if at least one point in the offset cube has a value of

\delta {B}_{\mathrm{T}}/\sqrt{{\delta B}_{\mathrm{X}}^{2}+{\delta B}_{\mathrm{Y}}^{2}{+\delta B}_{\mathrm{Z}}^{2}}

< 0.3, where δ B X , δ B Y , δ B Z , and δ B T are the standard deviations of B X , B Y , B Z , and B T , respectively.…”

Section: Application To Tianwen‐1 Orbitermentioning

confidence: 99%

Calibration of the Zero Offset of the Fluxgate Magnetometer on Board the Tianwen‐1 Orbiter in the Martian Magnetosheath

Wang,

Xiao,

et al. 2024

JGR Space Physics

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High‐precision measurements of the magnetic field are critical to explore the near‐Mars environment. The Mars Orbiter MAGnetometer (MOMAG) is one of seven payloads on board the Tianwen‐1 orbiter. Its zero offset needs regular calibration, and the Wang‐Pan method I is applied to the MOMAG when the Tianwen‐1 orbiter is in the solar wind. The orbiter will remain out of the solar wind over tens of days each year, a method is necessary to ensure the accuracy of the zero offset during this period. Recently, a new method was proposed by Wang (2022b), https://doi.org/10.3847/1538-4357/ac822c, which is referred to as the Wang method II for ease of description. Here, we test the performance of this method using the MOMAG data measured in the Martian magnetosheath. We find that the zero offset Ow determined by the Wang method II varies around the zero offset Owp calculated by the Wang‐Pan method I using the potential Alfvénic fluctuations in the solar wind. After smoothing with a temporal window of 27 days, Ow is able to achieve an accuracy close to Owp. If the data segment has no gaps and its duration is < 27 days, the smoothed Ow might have an error >2 nT, but the error tends to be smaller if the segment's duration is longer. Our tests suggest that the Wang method II is suitable for the in‐flight calibration of the MOMAG when the Tianwen‐1 orbiter remains out of the solar wind.

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\delta {B}_{\mathrm{T}}/\sqrt{{\delta B}_{\mathrm{X}}^{2}+{\delta B}_{\mathrm{Y}}^{2}{+\delta B}_{\mathrm{Z}}^{2}}

< 0.3, where δ B X , δ B Y , δ B Z , and δ B T are the standard deviations of B X , B Y , B Z , and B T , respectively.…”

Section: Application To Tianwen‐1 Orbitermentioning

confidence: 99%

Calibration of the Zero Offset of the Fluxgate Magnetometer on Board the Tianwen‐1 Orbiter in the Martian Magnetosheath

Wang,

Xiao,

et al. 2024

JGR Space Physics

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“…The Wang-Pan method I is based on the properties of the Alfvén waves, and reduces the possible range of the zero offset from the whole offset cube to a straight line when using one wave event (Wang & Pan 2021a;Hu et al 2022). This line is called the optimal offset line (OOL).…”

Section: Introductionmentioning

confidence: 99%

High-precision Calibration of the Fluxgate Magnetometer Offset Vector in the Terrestrial Magnetosheath

Wang

2022

ApJ

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High-precision magnetic field measurements are of great significance for the in-depth study of the physical processes in the astrophysical plasma environment. To obtain accurate natural magnetic fields, in-flight calibration is one key step to obtaining zero offset of the spaceborne fluxgate magnetometer (FGM). Mirror mode structures, widely existing in the solar wind and planetary magnetosheaths and magnetospheres, can be used to calculate the zero offset. However, it is difficult to obtain an accurate zero offset by the current methods using mirror mode structures in the planetary magnetosheath. Here, we develop a new method to calculate the zero offset of the spaceborne FGM using magnetic dips, which are a kind of mirror mode structure. This method is based on the assumption that the magnetic field is zero in the cross section of the magnetic dip. Our method is able to calculate the zero offset using only one magnetic dip. We test this method by using the data from the Magnetospheric Multiscale Mission, and find that the calculation errors of 78.1% of the estimated zero offsets are <0.5 nT when using 25 magnetic dips in the terrestrial magnetosheath. This suggests that our method is able to achieve a high accuracy of the zero offset in the planetary magnetosheath.

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Automatic calculation of the magnetometer zero offset using the interplanetary magnetic field based on the Wang–Pan method

Cited by 2 publications

References 22 publications

Calibration of the Zero Offset of the Fluxgate Magnetometer on Board the Tianwen‐1 Orbiter in the Martian Magnetosheath

Calibration of the Zero Offset of the Fluxgate Magnetometer on Board the Tianwen‐1 Orbiter in the Martian Magnetosheath

High-precision Calibration of the Fluxgate Magnetometer Offset Vector in the Terrestrial Magnetosheath

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