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Geoscientific Instrumentation, Methods and Data Systems An interactive open-access journal of the European Geosciences Union

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https://doi.org/10.5194/gi-2018-3
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
Research article
14 Feb 2018
Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Geoscientific Instrumentation, Methods and Data Systems (GI).
Background noise estimation of geomagnetic signal
Xiuyi Yao1, Suqin Zhang2, Yuntian Teng2, and Dongmei Yang2 1Yunnan Earthquake Agency, Kunming, China
2Institute of Geophysics, China Earthquake Administration, P.O. Box 166, Beijing, China
Abstract. A fast Fourier transform was applied to fit the geomagnetic diurnal variation. Fitting results showed that when the polynomial degree was greater than 160, the residual error was close to 0 nT. White noise is the main component of the residual error when the polynomial degree was greater than 160, so this method was adopted to calculate the background noise of the geomagnetic field. Spectrum analysis further demonstrated the necessity to remove background noise from geomagnetic data.

Citation: Yao, X., Zhang, S., Teng, Y., and Yang, D.: Background noise estimation of geomagnetic signal, Geosci. Instrum. Method. Data Syst. Discuss., https://doi.org/10.5194/gi-2018-3, in review, 2018.
Xiuyi Yao et al.
Xiuyi Yao et al.
Xiuyi Yao et al.

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Short summary
A fast Fourier transform was applied to fit the geomagnetic diurnal variation. Fitting results showed that when the polynomial degree was greater than 160, the residual error was close to 0 nT. White noise is the main component of the residual error when the polynomial degree was greater than 160, so this method was adopted to calculate the background noise of the geomagnetic field. Spectrum analysis further demonstrated the necessity to remove background noise from geomagnetic data.
A fast Fourier transform was applied to fit the geomagnetic diurnal variation. Fitting results...
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