Background noise estimation of the geomagnetic signal

Yao, Xiuyi; Zhang, Suqin; Teng, Yuntian; Yang, Dongmei

doi:https://doi.org/10.5194/gi-7-189-2018

Articles | Volume 7, issue 3

https://doi.org/10.5194/gi-7-189-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/gi-7-189-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 7, issue 3

Research article

|

03 Jul 2018

Research article |

| 03 Jul 2018

Background noise estimation of the geomagnetic signal

Xiuyi Yao, Suqin Zhang, Yuntian Teng, and Dongmei Yang

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Final revised paper (published on 03 Jul 2018)
Supplement to the final revised paper
Preprint (discussion started on 14 Feb 2018)

Interactive discussion

Status: closed

AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment

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- Supplement

RC1: 'Review report_zxd', Xudong Zhao, 20 Mar 2018
- AC1: 'reply to comments of RC1 made by Xudong Zhao', Xiuyi Yao, 28 Mar 2018
RC2: 'magnetic data processing', Anonymous Referee #2, 02 Apr 2018
AC2: 'response to comment', Xiuyi Yao, 04 Apr 2018

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.