基于绝对磁场测量的磁通门磁强计在轨标定方法

张镇琦; 李磊; 周斌; 张艺腾

doi:10.11728/cjss2014.02.235

基于绝对磁场测量的磁通门磁强计在轨标定方法

doi: 10.11728/cjss2014.02.235

张镇琦^1,2, ,,
李磊¹,
周斌¹,
张艺腾¹

1.
中国科学院空间科学与应用研究中心北京 100190
2.
中国科学院大学北京 100049

详细信息

通讯作者:
张镇琦,E-mail:pkuzzq@126.com

中图分类号: V447;P353.1
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出版历程
- 收稿日期: 2013-03-20
- 修回日期: 2014-01-06
- 刊出日期: 2014-03-15

A method of in-orbit calibration of fluxgate magnetometer based on the measurement of absolute scalar magnetometer

1.
Center for Space Science and Applied Research, Chinese Academy of Sciences, Beijing 100190
2.
University of Chinese Academy of Sciences, Beijing 100049

摘要

摘要: 卫星在轨进行磁场测绘及监测时，需要高精度的磁场值，但由于磁通门磁强计三轴非正交性以及零点漂移所引起的误差大大降低了磁强计的测量精度，因而有必要对此进行校正.本文利用绝对标量磁强计，采用一种改进的最小二乘标定算法，通过不断迭代实现对磁通门三轴正交性和零点漂移的修正.结果表明，在考虑了磁强计本身噪声水平的实际情况下，磁通门磁强计的误差可由100nT左右修正到0.2nT以内.该算法为卫星在轨高精度磁场测量提供了一种可行的方法.
- 磁通门磁强计 /
- 卫星在轨标定 /
- 标定算法
Abstract: High precision measurement of the magnetic field is required for in-orbit magnetic field monitoring and mapping. Due to the restrictions of processing technology and installation, the three axes of fluxgate magnetometer cannot be strictly orthogonal and the offsets in three directions are unknown in actual measurement. To solve this problem, it is necessary to determine the alignment and offset of the fluxgate magnetometer in-orbit instead of on the ground. According to the method of calibrating with scalar magnetometer, a method for calibrating the alignment, sensitivity, and offset by an improved least square calibration algorithm is proposed. Results show that considering the noise of detector itself, the error of fluxgate magnetometer can be reduced from about 100nT to less than 0.2nT. This calibration algorithm offers a feasible way of in-orbit high-precision measurements.
- Fluxgate magnetometer /
- In-orbit calibration /
- Calibration algorithm

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参考文献(8)

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