Hochpräzise Bestimmung eines astrogeodätischen Quasigeoidprofils im Harz für die Validierung des Quasigeoidmodells GCG05
MetadataShow full item record
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 averagestation 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 1.5-2 mm. The comparison between the astrogeodetic solution and the gravimetric model GCG05 shows a RMS error of about 3 mm and maximum differences of 7 mm.
Showing items related by title, author, creator and subject.
Hirt, Christian; Denker, H.; Flury, J.; Lindau, A.; Seeber, G. (2009)In regions with a rough topography, e.g. the European Alps, the accuracy of geoid or quasigeoid models is often reduced. For the validation and accuracy assessment of gravimetric models, astronomical levelling is a ...
A high-precision digital astrogeodetic traverse in an area of steep geoid gradients close to the coast of Perth, Western AustraliaSchack, P.; Hirt, C.; Hauk, M.; Featherstone, Will; Lyon, Todd; Guillaume, S. (2018)We present results from a new vertical deflection (VD) traverse observed in Perth, Western Australia, which is the first of its kind in the Southern Hemisphere. A digital astrogeodetic QDaedalus instrument was deployed ...
Astronomical-topographic levelling using high-precision astrogeodetic vertical deflections and digital terrain model dataHirt, Christian; Flury, J. (2009)At the beginning of the twenty-first century, a technological change took place in geodetic astronomy by the development of Digital Zenith Camera Systems (DZCS). Such instruments provide vertical deflection data at an ...