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In-orbit calibration of the lunar magnetometer onboard SELENE (KAGUYA)

机译：SELENE（KAGUYA）登月磁力计的在轨校准

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摘要

The high-sensitivity fluxgate Lunar MAGnetometer (LMAG) is mounted on SELENE (KAGUYA) to investigate the near-surface electromagnetic environment and the evolution of the Moon through magnetic field observation. To avoid possible electromagnetic interferences, a triaxial fluxgate sensor (MGF-S) is installed at the far end of a 12-m-long mast. It is critical for the accurate observation to monitor MGF-S alignment in orbit, and thus We have calibrated the sensor alignment by measuring the known magnetic fields generated by the sensor alignment monitor coil (SAM-C) Wound onto the mast canister. In-orbit calibration of the MGF-S alignment Was performed twice each revolution during the initial check-out phase of the satellite. It is concluded that there is no systematic difference in the sensor alignment between the day-side and night-side. Applying a new technique based oil the Davis-Smith method to the observed magnetic field data when KAGUYA was exposed to the solar wind, a zero offset of each axis was quickly and stably determined every month. As a result, LMAG has been calibrated with an accuracy that is sufficient for detection of the lunar magnetic anomaly at an altitude of 100 km and for high-resolution electron reflectometry.
机译：高灵敏度磁通门月球磁力仪（LMAG）安装在SELENE（KAGUYA）上，用于通过磁场观测研究近地表电磁环境和月球的演化。为避免可能的电磁干扰，在长12米的桅杆的远端安装了三轴磁通门传感器（MGF-S）。精确观测对轨道上的MGF-S对准至关重要，因此，我们已经通过测量缠绕在桅杆筒上的传感器对准监视线圈（SAM-C）产生的已知磁场来校准传感器对准。在卫星的初始检验阶段，每旋转一圈，对MGF-S对准进行在轨校准。结论是，白天和夜晚之间的传感器对准没有系统上的差异。当将KAGUYA暴露于太阳风中时，将基于Davis-Smith方法的石油新技术应用于观测到的磁场数据，每个月即可快速，稳定地确定每个轴的零偏移。结果，已经对LMAG进行了校准，该精度足以检测100 km高度的月球磁异常和高分辨率电子反射仪。

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