Pervasive white and colored noise removing from magnetotelluric time series

Hanieh Mardomi؛ Mir Sattar Meshinchi Asl؛ Hamid Reza Siahkoohi

دوره 27، Special Journal-106 ، اسفند 1396، ، صفحه 69-74

  Magnetotellurics is an exploration method which is based on measurement of natural electric and magnetic fields of the Earth and is increasingly used in geological applications, petroleum industry, geothermal sources detection and crust and lithosphere studies. In this work, discrete wavelet transform of magnetotelluric signals was performed. Discrete wavelet transform decomposes signals into coefficients in multi-scales. Noise and signal portions are separable in multi-scale mode. Therefore, noise can be discarded in each scale; a threshold value is constructed dependent to coefficients of the ...  بیشتر