| 第七代国际地磁参考场的检验与评价 |
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| 引用本文： | 王月华.第七代国际地磁参考场的检验与评价[J].地球物理学进展,2000,15(1):89-97. |
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| 作者姓名： | 王月华 |
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| 作者单位： | 中国科学院地质与地球物理研究所,北京,100101 |
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| 基金项目： | 国家自然科学基金!(497742 15 ,49734 140 ) |
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| 摘 要： | 本文对国际地磁和高空物理学会推荐的第七代国际地磁参考场进行了检验和评价。评价工作是通过１９６０～１９９５年（５年间隔）中国地磁台的观测数据；对中国地区复测点的测量数据；中国地区三阶泰乐多项式模型与第七代国际地磁参考场模型进行了比较，求得了平均差和标准偏差。并以１９９０年代为例，做出了１９９０年代各个地磁要素两个模型计算值之间的差值图，图上显示出这些差值的异常分布，这结异常是来自地壳源，比较结果，可
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| 关 键 词： | 国际地磁参考场 确定模型 磁场 地磁 |
EXAMINATION AND EVALUATION OF INTERNATIONAL GEOMAGNETIC FIELD FOR THE SEVENTH GENERATION |
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| WANG Yue-Hua.EXAMINATION AND EVALUATION OF INTERNATIONAL GEOMAGNETIC FIELD FOR THE SEVENTH GENERATION[J].Progress in Geophysics,2000,15(1):89-97. |
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| Authors: | WANG Yue-Hua |
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| Abstract: | The seventh-generation of International geomagnetic Reference Field(IGRF) recommended by the International association of Geomagnetism and Aeronomy(IAGA) has been examinated and evaluated in following aspects:The comparison was made annual means of magnetic obsevartories of China with IGRF derived geomagnetic Values;The repeat Stations data of geomagnetic elements measured over China areas and the values given by the IGRF were compared. The Taylor polynomial models of degree 3 of geomagnetic field over China (Called CH3D) and main field models of IGRF were compared:Mean differences and root mean sguare (RMS)deviation were obtained.as example for 1990 epoch,the maps of differences between the values computed from CH3D1990 and the corresponding DGRF 1990 values were constructed.The differences anomalies are associated with crources in the crust. Results of these comparisons show the IGRF-Seventh generation is a better geomagnetic references field for Chinese area. |
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| Keywords: | International Geomagnetic Reference Field Definitive model Main field model |
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