Title: DETERMINATION OF QUASIGEOID IN LOCAL NETWORK USING MODERN ASTROGEODETIC TECHNOLOGIES |
Authors: Volarik Tomas, Machotka Radovan, Kuruc Michal, Puchrik Lukas and Jurcik Josef |
DOI: 10.13168/AGG.2013.0043 |
Journal: Acta Geodynamica et Geomaterialia, Vol. 10, No. 4 (172), Prague 2013 |
Full Text: PDF file (0.7 MB) |
Keywords: astrogeodetic vertical deflections, astronomical levelling, quasigeoid heights, Mobile Automated Astronomical System (MAAS) |
Abstract: This study shows the test usage of Mobile Automated Astronomical System No. 1 (MAAS-1) in a local network with an area
of approximately 50 km sq. The network has been built-up especially for experimental purposes to compare the local
quasigeoid model determined by three different methods, namely GNSS-levelling, astronomical levelling and gravimetry. The
network consists of 34 core points where the astronomic and geodetic coordinates have been measured. Subsequently, the
measured data have been processed to obtain vertical deflections and to determine the quasigeoid heights by astronomical
levelling. Afterwards, the quasigeoid model has been independently determined also using gravimetric measurements and by
the method of GNSS-levelling. In this paper the results of the comparison of quasigeoid models are being presented. The
overall agreement of independently determined quasigeoids is on the level of 3 mm. After an overall accuracy evaluation of
resulting quasigeoid model authors discuss the benefits of astronomical measurements using MAAS-1. |