FHD仪偏置线圈电流反向对D分量基线值的影响及修正方法

Influence of Electrical Current Reverse in Coil of FHD Instrument on Baseline of D Component and Methods for Correction

在地磁连续观测中,需要通过分析计算观测数据对仪器的工作状态作出正确的判断,介绍了判断FHD仪偏置线圈电流是否反向的2种方法,研究了反向前后基线值的变化情况并提出了修正方法。

For continuously geomagnetic observation, correct judgment should be made to working states of a instrument through analyzing and calculating observed data. In this paper, two methods to judge if the electrical current in bias coil of a FHD Instrument is inverse and some methods to make correction, based on the variation of baseline value before and after the inverse, are introduced.