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Journal of Geodetic Science

Editor-in-Chief: Sjöberg, Lars

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2081-9943
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Evaluation of W0 in Canada using tide gauges and GOCE gravity field models

T. Hayden
  • Department of Geomatics Engineering, Schulich School of Engineering, University of Calgary, 2500 University Drive NW, Calgary, AB, T2N 1N4, Canada
  • Other articles by this author:
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/ E. Rangelova
  • Department of Geomatics Engineering, Schulich School of Engineering, University of Calgary, 2500 University Drive NW, Calgary, AB, T2N 1N4, Canada
  • Other articles by this author:
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/ M. G. Sideris
  • Department of Geomatics Engineering, Schulich School of Engineering, University of Calgary, 2500 University Drive NW, Calgary, AB, T2N 1N4, Canada
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  • De Gruyter OnlineGoogle Scholar
/ M. Véronneau
  • Geodetic Survey Division, Natural Resources Canada, 615 Booth Street, Ottawa, Ontario, K1A 0E9, Canada
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
Published Online: 2013-01-29 | DOI: https://doi.org/10.2478/v10156-012-0003-9

Abstract

The existing Canadian Geodetic Vertical Datum of 1928 (CGVD28) does not meet the needs of the modern user in terms of accuracy and accessibility. As a result, Canada plans to implement a geoid-based and global navigation satellite system (GNSS)-accessible vertical datum by 2013. One of the primary concerns in realizing this new vertical datum is to determine a W0 value that will represent the potential of the zero height surface. The objective of this study is to evaluate W0 by averaging the potential of points on the mean sea water surface utilizing tide gauge recordings and gravity field and steady-state ocean circulation explorer (GOCE)-based global geopotential models. In order to assess the performance of the GOCE-based models for the computation of W0, the models are extended with the high resolution gravitational model EGM2008. Regional gravimetric geoid models are also used for the estimation of W0. Additionally, local sea surface topography models are utilized in order to validate the W0 results at the tide gauges. Excluding the Arctic coast, the W0 values obtained from both tide gauges and oceanic sea surface topography models are not statistically different from the International Earth Rotation and Reference Systems Service (IERS) 2010 global conventional value 62636856.00 m2/s2.

Keywords: GOCE; mean sea level; sea surface topography; vertical datum; W<sub>0<sub/>

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About the article

Published Online: 2013-01-29

Published in Print: 2012-12-01


Citation Information: Journal of Geodetic Science, ISSN (Print) 2081-9943, DOI: https://doi.org/10.2478/v10156-012-0003-9.

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