Acta Geodynamica et Geomaterialia

Title: VALIDATION OF REGIONAL GEOID MODELS FOR POLAND: LOWER SILESIA CASE STUDY
Authors: Stepniak Katarzyna, Baryla Radoslaw, Paziewski Jacek, Golaszewski Pawel, Wielgosz Pawel,Kurpinski Grzegorz and Osada Edward
DOI: 10.13168/AGG.2016.0031
Journal: Acta Geodynamica et Geomaterialia, Vol. 14, No. 1 (185), Prague 2017
Full Text: PDF file (0.5 MB)
Keywords: GNSS, satellite leveling, precise leveling, quasigeoid models
Abstract: Nowadays, the high accuracy of the horizontal coordinates obtained from GNSS measurements is easily achievable. On the other hand, the precision of GNSS-derived heights is clearly lower. Nevertheless, state of the art measurement technique, field surveying equipment, data processing software and algorithms allow achieving millimeter-level accuracy for ellipsoidal heights. However, in order to obtain the normal heights from GNSS measurements, the application of precise quasigeoid model is necessary. Nowadays, there are several available guasiqeoid models covering the area of Poland, e.g. PL-geoid-2011; EGM2008; “leveling geoid 2001”; European Gravimetric Quasigeoid model EGG2008. In addition, a high-accuracy regional quasigeoid model for the Lower Silesia region was developed in 2015. In this paper, we investigate performance of the application of the selected quasigeoid models to satellite leveling on the basis of test precise leveling network established at the area of Lower Silesia in Poland. In this region, simultaneous precise geometric and satellite leveling measurements were carried out on over 1000 km of leveling lines and over 100 GNSS sites. The results show that the current relative accuracy of the most accurate geoid models is better than 10 mm.