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)
-
Details in the research portal "Research@Leibniz University"