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Regional Models

Latvia (LV98)


  Author: J. Kaminskis     Created: 1998    Resp: J. Kaminskis  
      Status: PUBLIC    
Description:
The Latvian quasigeoid LV98 is a gravimetric solution referred to the GRS80 ellipsoid and given in the ETRF89 geodetic reference system. This grid model, with a resolution of 1.5' x 3.0', was computed from measured and digitalized terrestrial gravity data, as well as gravity data in the Baltic Sea derived from ERS-l altimetric mission. The FFT Stokes' formula was used for the quasigeoid computation, in the framework of a remove-restore procedure based on the EGM96 global model up to degree and order 360. A 4-parameter empirical datum fit to GPS/levelling data was finally performed, obtaining an estimated accuracy of about 6-8 cm.

References:
J. Kaminskis, R. Forsberg (1996). A new detailed geoid for Latvia. In: J. Segawa, H. Fujimoto, S. Okubo (eds.), Gravity, Geoid and Marine geodesy, IAG Symposia Series, vol. 117, pp. 621-628, Springer Verlag.
J. Kaminskis (2010). Latvian geoid model and its development. Academic dissertation (in Latvian), Riga Technical University, Riga, ISBN 978-9934-507-27-4, 150 pages.

Latvia