| 基于数字地磁资料的滤波幅相法初步应用研究 |
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| 引用本文： | 冯志生,张苏平,梅卫萍,居海华,张秀霞,杨从杰.基于数字地磁资料的滤波幅相法初步应用研究[J].地震,2006,26(1):93-98. |
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| 作者姓名： | 冯志生 张苏平 梅卫萍 居海华 张秀霞 杨从杰 |
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| 作者单位： | 1. 江苏省地震局,江苏,南京,210014
2. 甘肃省地震局,甘肃,兰州,730000 |
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| 基金项目： | “十五”国家科技攻关项目(2004BA601B01-03-02) |
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| 摘 要： | 根据地磁垂直分量日变化畸变异常的周期特征,应用FHD磁力仪分钟值观测资料,通过富氏拟合滤出1~3 h的日变化,突出垂直分量日变化中的畸变变化,直接获取了幅相法异常。新方法只需单台的垂直分量分钟值观测资料,克服了原有幅相法需要参考台资料的缺陷,方便了异常提取,拓展了数字地磁观测资料的应用范围。
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| 关 键 词： | 地磁垂直分量 数字地磁 日变化 畸变异常 滤波幅相法 |
| 文章编号： | 1000-3274(2006)01-0093-06 |
| 收稿时间： | 2005-06-06 |
| 修稿时间： | 2005-07-04 |
Preliminary study and application of amplitude-phase method of digital geomagnetic data by using the filtering method |
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| FENG Zhi-sheng,ZHANG Su-ping,MEI Wei-ping,JU Hai-hua,ZHANG Xiu-xia,YANG Cong-jie.Preliminary study and application of amplitude-phase method of digital geomagnetic data by using the filtering method[J].Earthquake,2006,26(1):93-98. |
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| Authors: | FENG Zhi-sheng ZHANG Su-ping MEI Wei-ping JU Hai-hua ZHANG Xiu-xia YANG Cong-jie |
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| Institution: | 1.Earthquake Administration of Jiangsu Province, Nanjing 210014; 2. Earthquake Administration of Gansu Province, Lanzhou 370000, China |
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| Abstract: | Based on the periodic characteristics of the anomaly of the daily variation of geomagnetic Z component,by using the data of FHD Magnetometer in the 1.0 min sampling rate,we filter out the variation whose period is from 1 to 3 hour from the daily variation of Z component using the method of Fourier estimate,and then we extrude the anomaly of the daily variation of Z component,get the anomaly of amplitude-Phase method.The new method only requires the data of geomagnetic Z component of one station in the 1.0 min sampling rate,and overcomes the limitation of the old amplitude-phase method which requires the data of two stations.The new method is convenient to get the anomaly,and widen the application field of digital geomagnetic data. |
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| Keywords: | Geomagnetic Z component Digital geomagnetic Daily variation Anomaly Filtering amplitude-phase method |
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