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- W4297829371 abstract "Summary This work investigates a novel approach for investigating correlated measurement errors in TEM data. Generally, measurement errors are assumed uncorrelated. However, noise sources include very-low-frequency (VLF) signals such as radio waves, which are not random. TEM monitoring, where systems are installed semi-permanently, offers the unique opportunity to investigate measurement errors more thoroughly. The signal-to-noise ratio in TEM data is generally improved by data stacking; however, continued stacking of correlated noise sources may introduce bias. Such biases are significant when the target of interest is subtle variations such as groundwater table variations. This work provides some background on the general treatment of errors in TEM data before an approach utilizing covariance matrices for characterizing correlated noise is introduced. The noise in a monitoring TEM data set indicated that errors were strongly correlated; furthermore, patterns in covariance matrices change between daily surveys showing that the proportions of VLF signals are not stable over time." @default.
- W4297829371 created "2022-10-01" @default.
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- W4297829371 date "2022-01-01" @default.
- W4297829371 modified "2023-09-26" @default.
- W4297829371 title "On The Presence of Correlated Noise in Transient Electromagnetic (Tem) Monitoring Data" @default.
- W4297829371 doi "https://doi.org/10.3997/2214-4609.202220119" @default.
- W4297829371 hasPublicationYear "2022" @default.
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