地磁方位标志的稳定性与磁偏角观测精度的研究  

Research on the Stability of Geomagnetic Azimuth Marks and the Accuracy of Magnetic Declination Observation

作　　者：吴玉田[1] 徐学恭[1] 张明东[1] 周锦屏[2] 尚先旗 胡培元[1] 

机构地区：[1]天津市地震局,天津300201 [2]中国地震局地球物理研究所,北京100081

出　　处：《华北地震科学》2010年第1期48-51,共4页North China Earthquake Sciences

摘　　要：地磁台是产出连续完整、准确可靠的地球磁场变化数据的场所。而对某测点地球磁场的描述是以磁偏角D、磁倾角I、总强度F、水平强度H、北向强度X、西向强度Y、垂直强度Z等七要素为依据。其中只需直接测定3个独立量，如D、H、Z或D、I、F等组合，则其它量可通过数学关系求得。特别是，磁偏角D在观测中非常重要。本文对静海地磁台改造后连续7年（2002-2008年）的观测记录资料，进行了认真整理和细致研究，研究了标志的漂移对观测值D的影响，说明了观测标志稳定的重要性。The geomagnetic observation station is a scientific research place, from where complete, accurate and reliable data of the earth＇s magnetic field changes is output. The description of a measuring point on the earth＇s magnetic field is based on seven elements, the magnetic declination D, the magnetic inclination I, the total intensity F, the horizontal component H, the northern component X, the western component Y, the vertical component Z. In fact, only three independent components are direct surveyed, such as D, H, Z or D, I, F, the other elements can be obtained through mathematical functions. However, D is an essential element. This paper analyzes 7 consecutive years （2002-2008） observation data of the Jinghai geomagnetic observation station, through meticulous collation and research. The result shows that azimuth marks shift affects the magnetic declination D, keep observing signs stability is very important.

关 键 词：标志漂移 标志稳定性 磁偏角 

分 类 号：P315.72[天文地球—地震学]