Chameleonic Noise In GPS Position Time Series: Analysis And Implications For Geodetic Parameters.pdf

JGR Solid Earth - 2021 - Santamar aE28090G mez - Chameleonic Noise in GPS Position Time Series.pdf
Preview of Chameleonic Noise in GPS Position Time Series: Analysis and Implications for Geodetic Parameters
🔗 Source: insu.hal.science
📊 Size: 1.68 MB
👤 Author: Alvaro Santamaría-Gómez, Jim Ray
⬇️ Downloads: 156

Summary

The paper "Chameleonic Noise in GPS Position Time Series" by Alvaro Santamaría-Gómez and Jim Ray addresses the challenge of distinguishing signal from noise in GPS time series analysis. It highlights that traditional methods often underestimate uncertainties due to unaccounted time-correlated errors, which are spatially and temporally correlated. The study emphasizes the impact of position offsets on noise color perception, suggesting these offsets can obscure long-period Earth deformation signals and random walk noise, leading to underestimated velocity uncertainties.

Key points include:
- Position offsets significantly affect power spectra at long periods, impacting velocity estimates.
- Ignoring offsets changes the perceived best-fitting noise model from flicker to Gauss-Markov.
- Offsets reduce detection chances for random walk noise and long-period Earth deformation signals in GPS series.

The paper critiques recent studies that downplay the impact of position offsets on GPS noise interpretation. It argues that these conclusions are based on misrepresentations, advocating for a reevaluation of how colored noise is understood in GPS data. The study underscores the importance of considering processing steps in generating observed time series to accurately assess their noise content.

Description

The document discusses "Chameleonic Noise in GPS Position Time Series," focusing on noise issues in GPS data analysis. Authored by Alvaro Santamaría-Gómez and Jim Ray, it was submitted to HAL on 6 Aug 2022. The study is published in the Journal of Geophysical Research: Solid Earth (2021).

Technical Information

  • File Format: PDF
  • File Size: 1.68 MB
  • Pages: 22
  • Language: EN
  • Author: Alvaro Santamaría-Gómez, Jim Ray
  • Total Downloads: 156
  • Last Updated: 3 weeks ago

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