Ground calibration of the high-sensitivity SELENE lunar magnetometer LMAG
Ground calibration of the high-sensitivity SELENE lunar magnetometer LMAG
复制标题
高灵敏度SELENE月球磁力计LMAG的地面校准
DOI：
10.1186/bf03352800
复制
发表时间：
2008
期刊：
影响因子：
--
通讯作者：
H. Tsunakawa
中科院分区：
文献类型：
--
作者：
H. Shimizu;F. Takahashi;Naoki Horii;A. Matsuoka;M. Matsushima;H. Shibuya;H. Tsunakawa
SELENE 高灵敏度磁通门月球磁力计 (LMAG) 的地面校准实验已进行，以确定传感器 (MGF-S) 的对准、灵敏度和偏移。经检查，传感器彼此正交在0.4度以内，并确认了环境磁场和传感器输出的线性度。此外，还检查了偏移和灵敏度的温度依赖性，但没有看到温度依赖性的清晰特征。 SELENE 拥有一个飞行校准系统，用于定期确定磁力计的方向。传感器对准监控线圈 (SAM-C) 系统产生的磁场用于飞行中校准。确定 SAM-C 生成的磁场分布，并估计磁力计位置和方向的确定精度。多次测量将使我们能够以大约 0.1 度的精度确定 MGF-S 的方向。根据地面和飞行中校准的结果进行适当修正将使我们能够以约 0.1 nT 的精度恢复月球附近的磁场。
Ground calibration experiments of the SELENE high sensitivity fluxgate Lunar Magnetometer (LMAG) have been performed in order to determine the alignment, sensitivity, and offset of the sensors (MGF-S). It is checked out that the sensors are orthogonal to each other within 0.4 degrees, and the linearity of the ambient magnetic field and the output from the sensors are confirmed. Also, the temperature dependences of the offset and sensitivity are examined but no clear signatures of temperature dependencies can be seen. SELENE has an in-flight calibration system in order to determine the direction of the magnetometer routinely. The magnetic fields generated by the sensor alignment monitor coil (SAM-C) system are used for the in-flight calibration. The magnetic field distributions generated by SAM-C are determined and the accuracy of determination of the magnetometer position and direction is estimated. Multiple measurements will allow us to determine the direction of MGF-S with about 0.1-degree accuracy. Appropriate corrections from the results of the ground and in-flight calibrations will allow us to recover the magnetic field near the moon with accuracy about 0.1 nT.