基于数字递归陷波的多通道瞬变电磁法周期噪声去除研究

张文伟, 底青云, 耿启立, 雷达, 王中兴, 缪佳佳

The removal of MTEM periodic noise based on digital recursive notching

Wen-Wei ZHANG, Qing-Yun DI, Qi-Li GENG, Da LEI, Zhong-Xin WANG, Jia-Jia MIAO

图9 MTEM野外实测数据周期噪声去除 a——发射电流; b—接收电压; c—直接计算的大地脉冲响应(虚线)与去除工频噪声后的大地脉冲响应(实线)

Fig.9 Removal of periodic noise in MTEM real field data a—source current; b—received voltage; c—direct estimated earth impulse response (dashed line) and denoised earth impulse response (solid line)