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Removal of sensor tilt noise in fluxgate gradiometer survey data by applying one-dimensional wavelet filtering

Nicolas Note (UGent) , Philippe De Smedt (UGent) , Timothy Saey (UGent) , Wouter Gheyle (UGent) , Birger Stichelbaut (UGent) , Hanne Van den Berghe (UGent) , Jean Bourgeois (UGent) , Veerle Van Eetvelde (UGent) and Marc Van Meirvenne (UGent)
(2017) ARCHAEOLOGICAL PROSPECTION. 24(4). p.353-360
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Abstract
Archaeological prospection with magnetometer instruments is performed in a wide range of field configurations, ranging from single probe setups to mobile arrays that allow combining multiple sensors. The latter type, whereby instruments are mounted onto a cart system, are particularly prone to motion-induced noise. Sensor tilt, for example, causes in-line noise that can obscure magnetic variations present. To remediate these effects, image processing techniques are the most frequently applied. However, while efficient in producing more levelled data plots, these procedures are often associated with a smoothing penalty whereby low-intensity or small-scale anomalies are masked. We propose a one-dimensional signal processing approach, based on discrete wavelet analysis. By selecting wavelets that correspond to the motion-induced noise patterns, such effects can be targeted more precisely, reducing the risk of feature masking or artefact creation. Evaluation of the proposed procedure on three fluxgate gradiometer datasets collected with a hand-propelled push-cart system, proved it a valid and more dedicated method to reduce the impact of motion induced noise in magnetometry data collected with cart mounted array setups.
Keywords
cart systems, denoising, magnetometry, sensor tilt, signal processing, wavelets, TRANSFORM

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Chicago
Note, Nicolas, Philippe De Smedt, Timothy Saey, Wouter Gheyle, Birger Stichelbaut, Hanne Van den Berghe, Jean Bourgeois, Veerle Van Eetvelde, and Marc Van Meirvenne. 2017. “Removal of Sensor Tilt Noise in Fluxgate Gradiometer Survey Data by Applying One-dimensional Wavelet Filtering.” Archaeological Prospection 24 (4): 353–360.
APA
Note, Nicolas, De Smedt, P., Saey, T., Gheyle, W., Stichelbaut, B., Van den Berghe, H., Bourgeois, J., et al. (2017). Removal of sensor tilt noise in fluxgate gradiometer survey data by applying one-dimensional wavelet filtering. ARCHAEOLOGICAL PROSPECTION, 24(4), 353–360.
Vancouver
1.
Note N, De Smedt P, Saey T, Gheyle W, Stichelbaut B, Van den Berghe H, et al. Removal of sensor tilt noise in fluxgate gradiometer survey data by applying one-dimensional wavelet filtering. ARCHAEOLOGICAL PROSPECTION. 2017;24(4):353–60.
MLA
Note, Nicolas, Philippe De Smedt, Timothy Saey, et al. “Removal of Sensor Tilt Noise in Fluxgate Gradiometer Survey Data by Applying One-dimensional Wavelet Filtering.” ARCHAEOLOGICAL PROSPECTION 24.4 (2017): 353–360. Print.
@article{8523954,
  abstract     = {Archaeological prospection with magnetometer instruments is performed in a wide range of field configurations, ranging from single probe setups to mobile arrays that allow combining multiple sensors. The latter type, whereby instruments are mounted onto a cart system, are particularly prone to motion-induced noise. Sensor tilt, for example, causes in-line noise that can obscure magnetic variations present. To remediate these effects, image processing techniques are the most frequently applied. However, while efficient in producing more levelled data plots, these procedures are often associated with a smoothing penalty whereby low-intensity or small-scale anomalies are masked. We propose a one-dimensional signal processing approach, based on discrete wavelet analysis. By selecting wavelets that correspond to the motion-induced noise patterns, such effects can be targeted more precisely, reducing the risk of feature masking or artefact creation. Evaluation of the proposed procedure on three fluxgate gradiometer datasets collected with a hand-propelled push-cart system, proved it a valid and more dedicated method to reduce the impact of motion induced noise in magnetometry data collected with cart mounted array setups.},
  author       = {Note, Nicolas and De Smedt, Philippe and Saey, Timothy and Gheyle, Wouter and Stichelbaut, Birger and Van den Berghe, Hanne and Bourgeois, Jean and Van Eetvelde, Veerle and Van Meirvenne, Marc},
  issn         = {1075-2196},
  journal      = {ARCHAEOLOGICAL PROSPECTION},
  keyword      = {cart systems,denoising,magnetometry,sensor tilt,signal processing,wavelets,TRANSFORM},
  language     = {eng},
  number       = {4},
  pages        = {353--360},
  title        = {Removal of sensor tilt noise in fluxgate gradiometer survey data by applying one-dimensional wavelet filtering},
  url          = {http://dx.doi.org/10.1002/arp.1574},
  volume       = {24},
  year         = {2017},
}

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