Hochpräzise Bestimmung eines astrogeodätischen Quasigeoidprofils im Harz für die Validierung des Quasigeoidmodells GCG05

authored by
Christian Hirt, Uwe Feldmann-Westendorff, Heiner Denker, Jakob Flury, Cord Hinrich Jahn, Andreas Lindau, Günter Seeber, Christian Voigt
Abstract

This paper deals with the determination of a high-precision astrogeodetic quasigeoid profile for the validation of the gravimetric quasigeoid model GCG05 in the Harz mountains in Northern Germany. The Hannover Digital Zenith Camera System TZK2-D was used for the observation of new vertical deflection data at densely spaced stations (500-600 m average station spacing) along a 63 km long traverse over the Harz mountains. For the computation of the astrogeodetic quasigeoid profile, the method of astronomical-topographic levelling was applied, using digital terrain model data for the interpolation of vertical deflections. The accuracy of the astrogeodetic quasigeoid profile has been estimated to be about 1.5-2mm. The comparison between the astrogeodetic solution and the gravimetric model GCG05 shows a RMS error of about 3mm and maximum differences of 7 mm.

Organisation(s)
Institute of Geodesy
External Organisation(s)
Universität Hamburg
National Metrology Institute of Germany (PTB)
State Office for Geoinformation and Surveying of Lower Saxony
University of Texas at Austin
Type
Article
Journal
ZFV - Zeitschrift fur Geodasie, Geoinformation und Landmanagement
Volume
133
Pages
108-119
No. of pages
12
ISSN
1618-8950
Publication date
2008
Publication status
Published
Peer reviewed
Yes
ASJC Scopus subject areas
Earth and Planetary Sciences(all)
Electronic version(s)
https://geodaesie.info/zfv/heftbeitrag/596 (Access: Unknown)
 

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