Research on maximum level noise contaminated of remote reference magnetotelluric measurements using synthesized data

3rd International Conference on Advances in Energy Resources and Environment Engineering

能源学;生态环境科学

Gang, Zhang^1 ; Fansong, Meng^1 ; Jianzhong, Wang^1 ; Mingtao, Ding^1

School of Environment and Resource, Southwest University of Science and Technology, Mianyang

621010, China^1

关键词: Correlation coefficient;    Geological interpretation;    Impedance tensor;    Magnetotelluric measurement;    Polarization direction;    Reference technique;    Remote stations;    Signal characteristic;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/113/1/012016/pdf
DOI  :  10.1088/1755-1315/113/1/012016

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Determining magnetotelluric impedance precisely and accurately is fundamental to valid inversion and geological interpretation. This study aims to determine the minimum value of signal-to-noise ratio (SNR) which maintains the effectiveness of remote reference technique. Results of standard time series simulation, addition of different Gaussian noises to obtain the different SNR time series, and analysis of the intermediate data, such as polarization direction, correlation coefficient, and impedance tensor, show that when the SNR value is larger than 23.5743, the polarization direction disorder at morphology and a smooth and accurate sounding carve value can be obtained. At this condition, the correlation coefficient value of nearly complete segments between the base and remote station is larger than 0.9, and impedance tensor Zxy presents only one aggregation, which meet the natural magnetotelluric signal characteristic.