ANALYSIS OF THE INTERNATIONAL GEOMAGNETIC REFERENCE FIELD ERROR IN THE CHINA CONTINENT

ANALYSIS OF THE INTERNATIONAL GEOMAGNETIC REFERENCE FIELD ERROR IN THE CHINA CONTINENT
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DOI:
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发表时间:
2003
期刊:
Chinese Journal of Geophysics
影响因子:
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通讯作者:
D. Wang
D. Wang
中科院分区:
其他
文献类型:
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作者:
D. Wang

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国际地磁参考场是地磁主场和长期变化的模型。忽略外场、球谐函数级数的截断程度、观测站的分布、测量以及忽略地壳地磁异常是造成IGRF误差的主要原因。对中国大陆地区IGRF误差进行分析,对利用IGRF资料有一定的参考价值。如果剔除有大扰动和地磁异常的北京观测站,29个主要观测站的IGRF均方根误差为146.9 nT。
IGRF(International Geomagnetic Reference Field) are the models of geomagnetic main field and secular variation. The IGRF errors are from neglecting external field, truncation level of the spherical harmonic series, observatory distribution, measurement, and neglecting the crust geomagnetic anomalies .Analyzing the IGRF error in China continent region is useful for using the IGRF data. If excluding Beijing observatory where there are great disturbances and geomagnetic anomaly , the root-mean-square error of IGRF for 29 main observatories is 146.9nT.