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The Iceland 1986 GPS geodetic survey: tectonic goals and data processing results

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Summary

The 1986 GPS survey of Iceland aimed to: (1) establish geodetic control in the South Iceland Seismic Zone (SISZ), to study destructive earthquakes there, (2) measure a country-wide network to form the basis of a new first order national network. 51 points were surveyed, with 20–30 km spacings within the SISZ and 100 km spacings elsewhere. The data were processed using the Bernese GPS software Version 3. Analysis was difficult due to poor satellite geometry and short-period ionospheric variations. However, an ambiguity-fixed, ionosphere-free solution gave accuracies of 1–2 cm in the horizontal and 2–3 cm in the vertical for the SISZ network and an ambiguity-free, ionosphere-free solution yielded accuracies of about 5 cm for the country-wide network. An ionosphere-free solution for the total survey with ambiguities fixed for the SISZ network only gave marginal additional improvements over the two separate solutions. GPS surveying has continued annually in Iceland with measurements in South Iceland in 1989 and 1992 (Hackman 1991; Sigmundsson 1992) and in North Iceland in 1987, 1990 and 1992 (Jahn et al. 1992; Foulger et al. 1992).

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Authors and Affiliations

  1. Dept. of Geological Sciences, University of Durham, DH1 3LE, Durham, UK

    G. R. Foulger

  2. Astronomical Inst., Univ. of Bern, Sidlerstrasse 5, CH-3012, Bern, Switzerland

    G. Beutler, S. Fankhauser, W. Gurtner, U. Hugentobler, M. Rothacher & U. Wild

  3. Dept. of Geological Sciences, University of Colorado, 80309-250, Boulder, CO, USA

    Roger Bilham

  4. Science Institute, University of Iceland, Reykjavik, Iceland

    Pall Einarsson

  5. Dept. of Geological and Geophysical Sciences, Princeton University, 08544, Princeton, NJ, USA

    W. Jason Morgan

  6. National Energy Authority, Reykjavik, Iceland

    Gunnar Thorbergsson

Authors
  1. G. R. Foulger
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  2. G. Beutler
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  3. Roger Bilham
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  4. Pall Einarsson
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  5. S. Fankhauser
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  6. W. Gurtner
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  7. U. Hugentobler
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  8. W. Jason Morgan
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  9. M. Rothacher
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  10. Gunnar Thorbergsson
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  11. U. Wild
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Foulger, G.R., Beutler, G., Bilham, R. et al. The Iceland 1986 GPS geodetic survey: tectonic goals and data processing results. Bulletin Géodésique 67, 148–172 (1993). https://doi.org/10.1007/BF00806254

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  • DOI: https://doi.org/10.1007/BF00806254

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