仪器定向误差对地磁日变化记录 准确度的影响研究

胡秀娟, 李西京, 王静, 李细顺, 畅国平, 王秀敏, 宋昭, 罗娜, 解真

胡秀娟, 李西京, 王静, 李细顺, 畅国平, 王秀敏, 宋昭, 罗娜, 解真. 2016: 仪器定向误差对地磁日变化记录 准确度的影响研究. 地震学报, 38(1): 130-137. DOI: 10.11939/jass.2016.01.013
引用本文: 胡秀娟, 李西京, 王静, 李细顺, 畅国平, 王秀敏, 宋昭, 罗娜, 解真. 2016: 仪器定向误差对地磁日变化记录 准确度的影响研究. 地震学报, 38(1): 130-137. DOI: 10.11939/jass.2016.01.013
Hu Xiujuan, Li Xijing, Wang Jing, Li Xishun, Chang Guoping, Wang Xiumin, Song Zhao, Luo Na, Xie Zhen. 2016: Influences of instrument orientation error on the accuracy of daily variation of geomagnetic record. Acta Seismologica Sinica, 38(1): 130-137. DOI: 10.11939/jass.2016.01.013
Citation: Hu Xiujuan, Li Xijing, Wang Jing, Li Xishun, Chang Guoping, Wang Xiumin, Song Zhao, Luo Na, Xie Zhen. 2016: Influences of instrument orientation error on the accuracy of daily variation of geomagnetic record. Acta Seismologica Sinica, 38(1): 130-137. DOI: 10.11939/jass.2016.01.013

仪器定向误差对地磁日变化记录 准确度的影响研究

基金项目: 

河北省地震局三结合课题 DZ20150424093

中国地震局行业标准 054219

详细信息
    通讯作者:

    胡秀娟, e-mail: 47982934@qq.com

  • 中图分类号: P318.6, TH762.3

Influences of instrument orientation error on the accuracy of daily variation of geomagnetic record

  • 摘要: 基于红山地磁台磁通门磁力仪GM4-2记录的日变化数据, 提出了一种减小仪器定向误差的方法, 即D要素磁轴零场漂移S0校正法. 首先基于零场漂移S0测量原理, 试制测量工具无磁旋转平台, 并对磁力仪GM4-2零场漂移S0值进行测量, 得出该值约为1024.7 nT; 然后在重新定向时对该数值进行误差校正; 最后将较正后的零场漂移S0值应用到理论日变化数据和定向后的实际日变化数据中. 结果表明, D要素磁轴零场漂移S0是产生定向误差的主要因素, 经过零场漂移S0校正后的日变化数据与理论日变化数据一致, 消除了由定向误差所造成的日变化畸变, 从而能更真实地反映地磁场变化.
    Abstract: Based on the daily variation of geomagnetic data recorded by fluxgate magnetometer GM4-2 at Hongshan geomagnetic observatory, this paper proposes a method for eliminating instrument orientation error, namely the correction method for magnetic axis zero drift S0 of D element. First, based on the mea-surement theory of magnetic axis zero drift S0, a rotation platform without magnetism has been trial-produced to measure the S0, which is about 1024.7 nT for the GM4-2. Then, we correct the error of S0 value in reorientation. Finally, the S0 value is applied to both theoretical daily variation and daily variation recorded by the instrument after orientation. The results show that the magne-tic axis zero drift S0 of D element is the main factor for the orientation error.The daily variation recorded by the instrument after orientation are consistent with the theoretical daily variation, thus eliminating the daily variation distortion caused by the orientation error, and reflecting the geomagnetic filed variation more realistically.
  • 图  1   2014年3—9月红山台磁力仪GM4-1(a)和GM4-2(b)D要素基线值曲线

    Figure  1.   Curves of baseline values of D element of fluxgate magnetometer GM4-1 (a) and GM4-2 (b) at Hongshan station during March to September in 2014

    图  2   磁力仪GM4-1和GM4-2记录的2014年9月10日D要素日变化 差值曲线(a)和磁力仪GM4-2记录的H分量日变化曲线(b)

    Figure  2.   The daily variation differential curves of D element recorded by two fluxgate magnetometers GM4-1 and GM4-2 (a) and the daily variation curve of H component recorded by GM4-2 (b) on September 10, 2014

    图  3   D磁轴定向位置(a)及其旋转180°位置(b)处零场漂移S0计算示意图

    Figure  3.   The calculating schematic diagram of zero drift S0 of D magnetic axis at the orientation position (a) and that after rotating 180° (b)

    图  4   2°定向误差角度所造成的D要素日变 化畸变示意图. HD为理论日变化数据, H′和D′为实测日变化数据

    Figure  4.   Schematic diagram of abnormal daily variation of D element caused by the orientation error angle 2°. H and D are the theoretical daily variation, H′ and D′ are the measured ones

    图  5   D要素实测(黑色和绿色)及理论日变化差值曲线(红色)

    Figure  5.   The measured daily variation differential curves of D element on September 10 (black line) and October 6 (green line) and the theoretical one on September 10 (red line)

    图  6   磁力仪GM4-2定向前(a)、 后(b)日变化标定曲线

    Figure  6.   The calibration curves of daily variation for fluxgate magnetometer GM4-2 before (a) and after orientation (b)

    表  1   2014年9月28日红山台磁力仪GM4-2零场漂移S0测量结果

    Table  1   Measurement results of the magnetic axis zero drift S0 of fluxgate magnetometer GM4-2 at Hongshan station on September 28, 2014

    组数D1/nTD2/nTS0/nT组数D1/nTD2/nTS0/nT
    1146190810275-15822221032
    2-26209810366-25122761012
    3-259231410297-27923191020
    4-3220661017
    注: D1D2分别为图3a, b的D要素输出值.
    下载: 导出CSV
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出版历程
  • 收稿日期:  2015-03-12
  • 修回日期:  2015-05-16
  • 发布日期:  2015-12-31

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