Comparison of Regional and Global GNSS Positions, Velocities and Residual Time Series

  • J. Legrand
  • N. Bergeot
  • C. Bruyninx
  • G. Wöppelmann
  • A. Santamaría-Gómez
  • M.-N. Bouin
  • Z. Altamimi
Conference paper
Part of the International Association of Geodesy Symposia book series (IAG SYMPOSIA, volume 136)

Abstract

More than 10 years (1996–2008) of weekly GPS solutions of 299 globally distributed stations have been used to quantify the impact of the reference frame definition and especially the size of the network on the estimated station positions, velocities, and residual position time series. For that purpose, weekly regional solutions (covering the European region) and global solutions have been respectively stacked to obtain regional and global station positions, velocities, and residual position time series. In both cases, the estimated long-term solutions have been tied to the ITRF2005 under minimal constraints using a selected set of reference stations. This study shows that: (1) regional position and velocity solutions can present biases with respect to each other and to global solutions, while in comparison, global solutions are much more stable; (2) the obtained residual position time series are affected by the size of the network with significantly reduced periodic signals in the regional networks, e.g. a 27% reduction of the annual signals in the height component.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • J. Legrand
    • 1
  • N. Bergeot
    • 1
  • C. Bruyninx
    • 1
  • G. Wöppelmann
    • 2
  • A. Santamaría-Gómez
    • 3
    • 4
  • M.-N. Bouin
    • 5
  • Z. Altamimi
    • 3
  1. 1.Royal Observatory of BelgiumBrusselsBelgium
  2. 2.UMR LIENSS, Université de La Rochelle-CNRSLa RochelleFrance
  3. 3.LAREG/IGNMarne-la-ValléeFrance
  4. 4.Instituto Geográfico NacionalMadridSpain
  5. 5.CNRM/Centre de Météo MarineBrestFrance

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