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Regional Models

Czech Republic (CR2000)


  Authors: J. Kostelecky, et al.     Created: 2000    Resp: J. Kostelecky  
      Status: PUBLIC    
Description:
The Czech Republic quasigeoid CR2000 is a gravimetric solution referred to the GRS80 system. Mean free-air anomalies in 1' x 1.5' grid were derived for Czech Republic territory from digitized gravity maps. Global gravity anomalies used for the remove-restore technique were calculated from the EGM96 geopotential model up to degree and order 360. The digital terrain model of the Czech Republic was provided by the Military Topographic Institute Dobruska. Gravimetric quasigeoid heights were computed by solving the Stokes' integral via Fast Fourier Transform (FFT). This discrete surface was aligned with the quasigeoid heights derived from precise GPS observations at 32 levelling benchmarks of the Czech Geodynamic Network (GEODYN) using a cubic polynomial transformation. The accuracy of the CR2000 quasigeoid was estimated using 532 independent GPS/levelling points, resulting in an error standard deviation of 3.4 cm.

References:
J. Kostelecky, J. Kostelecky Jr., I. Pesek, J. Simek, O. Svabensky, J. Weigel, A. Zeman (2004). Quasigeoids for the Territory of the Czech Republic. Studia Geophysica et Geodaetica, 48(3), pp. 503-518.

Czech Republic