地磁日变化记录准确度标定结果分析

摘要

为了定量考察地磁相对记录仪器记录到的地磁日变化的准确程度,对我国地磁台网中7个地磁台站2009年度的日变化准确度标定基线值数据的精度和稳定性进行分析,并选取成都、喀什2个台站2009年、2010年的数据,研究标定基线值随地磁日变化的变化情况.结果表明,在整个观测时段,D、H、Z三分量基线值的变化幅度及测量误差很小,在选定时段,基线值的变化与地磁场的日变化无明显相关性.%In order to investigate quantitatively the accuracy of geomagnetic daily variation recorded by FGE magnetometer, we analyze the stability and precision of some groups baseline values continuously recorded one day at seven observatories in 2009. The results show that the standard deviation and variable amplitude of the baseline values are small in D, H and Z components.Then we select the baseline values continuously recorded one day at CDP and KSH observatories in 2009 and 2010, and analyze the influence of absolute measurement intervals on the stability of the baselines.