都兰地震台不同地磁观测仪产出资料分析

ANALYSIS OF THE DATA PRODUCED BY DIFFERENT GEOMAGNETIC OBSERVATION IN STRUMENT ON THE SAME VENUE AT DULAN GEOMAGNETIC STATION

通过对都兰地震台同场地不同地磁观测仪器(GM4-XL型磁通门磁力仪与FHD-2质子矢量磁力仪)产出的观测资料进行对比,系统地分析日均值、分钟值、背景噪声等数据,认为3套仪器产出的数据差异较大,质子磁力仪较磁通门磁力仪长期趋势更加稳定,磁通门磁力仪存在长期漂移现象,且质子磁力仪噪声与磁通门磁力仪噪声相比较大。对引起数据曲线形态不一致、差值大的原因进行分析,得出影响因素主要为观测系统故障、仪器时间不一致、磁通门磁力仪探头所在环境温度的变化及仪器温度特性不同等。

By comparing the observation data produced by Dulan Geomagnetic Observatory on the same site(GM4-XL fluxgate magnetometer and FHD-2 proton vector magnetometer),systematically analyze the daily average value,minute value,background noise,etc.According to the data,it is believed that the short-term change curve shapes of the three sets of instruments are consistent but the difference is large,and the long-term change curve shape has a certain difference and the difference is large.The proton magnetometer is more stable than the fluxgate magnetometer in the long-term trend,and the fluxgate magnetometer There is a long-term drift phenomenon.The noise of the proton magnetometer is larger than that of the fluxgate magnetometer.Analyzing the reasons for the inconsistency and large difference of the data curve,it is concluded that the main influencing factors are the observation system failure,the inconsistent instrument time,the pre-processing error is not corrected in time,the influence of the ambient temperature where the fluxgate magnetometer probe is located,and the instrument temperature The result of a combination of characteristics and many other factors.