一种不借助零磁线圈的星载磁强计校准方法

文章介绍一种星载磁强计校准装置及方法。首先，将高精度地面磁强计的三分量磁传感器置于标准磁场发生装置形成的磁场环境内，通过后端数据处理装置采集得到第一磁场数据，并进行不同量程下螺线管线圈常数C_i的标定；然后，将星载磁强计置于上述标准磁场环境内，并以高精度地面磁强计不同量程下获得的C_i作为基准，通过后端数据处理装置采集得到第二磁场数据；最后，对第一磁场数据和第二磁场数据进行比对，得到星载磁强计的量程、分辨率及稳定性校准值。上述校准项目所有参数的校准结果不确定度为u=0.12%（k=2）。本方法已成功应用于多种军民型号星载磁强计校准。

A method of calibrating the onboard magnetometer without zero-field coil

This paper presents a method of calibrating the onboard magnetometer. Firstly, the three-component magnetic sensor of the high-precision ground magnetometer device is placed in the magnetic field ring formed by the standard magnetic field source generator, and the first group of the magnetic field data are collected by the back-end data processing device, and the solenoid coil constant C_i in different ranges is calibrated. Then, the satellite-borne magnetometer is placed inside the magnetic field ring formed by the above standard magnetic field source generator, and the coil constant C_i obtained in different ranges of the high-precision ground magnetometer is taken as the reference to obtain the second group of magnetic field data through the back-end data processing device. Finally, the above two groups of magnetic field data are compared to obtain the calibration values of the range, the resolution, and the stability of the satellite-borne magnetometer. The uncertainty of the calibration results for all parameters of the above calibration items is u=0.12% (k=2). The method has been successfully applied to the calibration of magnetometers for a variety of military and civilian satellites.