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Heights in the Bavarian Alps: Mutual Validation of GPS, Levelling, Gravimetric and Astrogeodetic Quasigeoids

  • Jakob FluryEmail author
  • Christian Gerlach
  • Christian Hirt
  • Uwe Schirmer
Chapter
Part of the International Association of Geodesy Symposia book series (IAG SYMPOSIA, volume 134)

Abstract

For many modern regional geoid and quasigeoid models accuracies of one or a few centimeters are given. Validation of these models, however, is often difficult due to the lack of independent data. In a test area of the Bavarian Alps, Germany, with dense data coverage, we carry out validation experiments using GPS, levelling and astrogeodetic observations as well as state-of-the-art regional quasigeoid models. The data cover very rough terrain and mountain peaks. We find a good mutual agreement with a typical scatter of height residuals of 1 – 2 cm. In some areas, however, systematic residual mean values of several centimeters are obtained which are possibly due to residual quasigeoid errors or due to a weak tie to the GPS reference frame.

Keywords

Heights GPS-levelling quasigeoid astrogeodetic quasigeoid 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2009

Authors and Affiliations

  • Jakob Flury
    • 1
    Email author
  • Christian Gerlach
    • 1
  • Christian Hirt
    • 1
  • Uwe Schirmer
    • 1
  1. 1.Institute for Astronomical and Physical Geodesy (IAPG), Technische Universität München, Germany, now at Center for Space Research, University of TexasTX 78759USA

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