Abstract：Characteristics of Hilbert time-frequency spectrum for magnetotelluric data are discussed in this paper.Using these characteristics,noise identification,data selection and piece-wise stationary approaches are developed for MT data processing.Field magnetotelluric data from Maodeng area,Inner Mongolia are analyzed to verify the validity of the method.The results show that Hilbert time-frequency spectrum can accurately describe point mutations and continuous segment and frequency energy distribution of magnetotelluric data.This provides the conditions for noise identification,data selection and piece-wise stationary.Hilbert spectrum can be used to recognize high signal to noise ratio,strong energy and uniform data for further parameter estimation in order to improve processed data quality.
蔡剑华, 胡惟文. Hilbert时频谱在大地电磁数据处理中的应用[J]. 石油地球物理勘探, 2011, 46(6): 984-988.
Cai Jian-hua, Hu Wei-wen. Application of Hilbert time-frequency spectrum in magnetotelluric data processing. OGP, 2011, 46(6): 984-988.
