SOMPI谱分析方法在感应磁场研究中的应用  

APPLICATION OF SOMPI SPECTRAL ANALYSIS TO GEOMAGNETIC INDUCTION STUDIES

作　　者：马熙康 符根荣 熊仲华[2] 

机构地区：[1]河南省地震局,郑州450000 [2]国家地震局地震技术专科学校,北京101601

出　　处：《地球物理学报》1993年第2期212-221,共10页Chinese Journal of Geophysics

基　　金：地震科学联合基金

摘　　要：本文应用地磁总强度变化记录近似确定局部感应磁场中的传递函数A,B.在求解过程中采用分辨率高、功率估计可靠性较强、适合短长度资料分析的SOMPI谱分析方法,提高了计算结果的可靠性和精度.通过与三分量计算结果相比较,证实了这种方法的可行性.据此,提出在无三分量记录地区用核旋仪台网研究地下电性结构横向不均匀性的设想.In this paper a method is introduced to detemine transfer function for geomagnetic induction studies by using total-field magnetic fluctuation data. The thoretical basis of the method is discussed. The new SOMPI spectral analysis method is applied, which has higher frequency resolution and higher accuracy of power estimation, and can be used to short data set. It is shown that the results by this method are generally in agree with those by using three components.Based on the above method, we propose a project that iaseral inhomogneity of electrical conductivity anomalies under the ground surface can be studied by using data of the nuclear precession magnetometer array.

关 键 词：地磁 总强度 SOMPI谱分析 磁场 

分 类 号：P318.1[天文地球—固体地球物理学]