物探化探计算技术2013，Vol.35Issue(2)：147-154,8.DOI:10.3969/j.issn.1001-1749.2013.02.05
大地电磁测深数据互参考处理的应用研究
A STUDY ON THE APPLICATION OF MUTUAL REFERENCE TECHNIQUE IN MAGNETOTELLURIC SOUNDING DATA
摘要
Abstract
Magnetotelluric sounding exploration vulnerable to the interference of radio stations, power grids, industrial free current and other human factors, resulting data features large deviation, distorted curve shape and low reliability. In this paper, based on the estimation formula of magnetotelluric impedance tensor, the degree of deviation of impedance tensor due to cultural noises is discussed. When there are uncorrelated noises in the electromagnetic components, a higher precise estimation of impedance tensor is obtained. As we known, the magnetic component of MT will not change too much in a certain distance, and if this distance is longer enough, the cultural noise at one site will not related to the other. This is the reason why we use the magnetic mutual reference method to improve the quality of field data. In this paper, a compromise scenario of the remote reference technique, the so-called mutual reference technique is expounded. The effect of application of this method is analyzed. The results show that this method is effective, and some problems in application are summarized.关键词
大地电磁测深/互参考技术/标准偏差/相干度/信噪比Key words
magnetotelluric sounding/ mutual reference technique/ standard deviation/ degree of coherence/ signal-to-noise ratio分类
天文与地球科学引用本文复制引用
戴前伟,陈勇雄,侯智超..大地电磁测深数据互参考处理的应用研究[J].物探化探计算技术,2013,35(2):147-154,8.基金项目
中南大学硕士生学位论文创新项目(2011ssxt055) （2011ssxt055）
湖南省研究生科研创新项目(CS2010B052) （CS2010B052）
