【摘要】 根据多年来大地电磁测深法 （ＭＴ） 野外资料采集的经验， 讨论了ＭＴ观测资料的噪声源， 着重分析了工业交流电对ＭＴ观测资料的影响。提出了压制噪声的一些具体措施， 从测量装置着手， 将人为差错和测量装置本身引入的噪声减少到最低限度。对工业交流电这一主要干扰源， 视具体情况采用挪点、旋转电道和磁道的布设方向、电磁屏蔽、十字型对称布极、远参考或互参考测量方法以及在资料处理时采用压制噪声的Ｒｏｂｕｓｔ处理方法等措施来压制噪声。这些措施在一定程度上能有效提高信噪比，改善ＭＴ野外观测资料的质量， 增强ＭＴ勘探的应用效果。更多还原

【Abstract】 Based on the some field acquisition experiences of MT data in the past many years, noise sources affecting real datum are discussed and the influence of industrial alternating current on measured MT data is analyzed in detail Some measures to suppress noises are put forward First, some man made and device derived noises are minimized Secondly, for the main disturbing source of industrial alternating current,moving sites, rotating layout direction of electric and magnetic lines, electromagnetic masking,cross type symmetric arrangement of electrodes, remote reference or cross reference measuring and Robust processing method to suppress noises are adapted As a result,signal to noise ratio is increased substantially and the quality of acquiring observed MT data is improved to strengthen the application of MT exploration更多还原