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Acta Geodynamica et Geomaterialia

 
Title: GEOID DETERMINATION FOR THE AREA OF POLAND BY THE LEAST SQUARES MODIFICATION OF STOKES_S FORMULA
 
Authors: Kuczynska-Siehien Joanna, Lyszkowicz Adam and Birylo Monika
 
DOI: 10.13168/AGG.2015.0041
 
Journal: Acta Geodynamica et Geomaterialia, Vol. 13, No. 1 (181), Prague 2016
 
Full Text: PDF file (1.0 MB)
 
Keywords: KTH method of geoid modelling, regional geoid determination, Stokes integral
 
Abstract: Previous geoid/quasigeoid models calculated for the area of Poland were based on the traditional “remove-compute-restore” procedure. One of the modifications of this method is the least squares modification of Stokes’ formula with additive corrections method (LSMSA), which was developed at the Royal Institute of Technology (KTH) in Stockholm in Sweden. The modified Stokes integral combines the regional terrestrial gravity data with a global geopotential model (GGM) giving the approximate geoid heights. To obtain the gravimetric geoid, four additive corrections, topographic, downward continuation, atmospheric and ellipsoidal, are calculated and applied. This paper presents the results of computation of a new gravimetric geoid model for Poland using the KTH method. In computations terrestrial gravity anomalies derived from nine different gravimetric data sets, global geopotential model EGM2008 and global elevation data SRTM v.4.1 were used. The determined gravimetric geoid model was evaluated with GPS/levelling points of the Polish ASG-EUPOS network. After fitting the geoid model to the GPS/levelling data using a 7-parameter model, the standard deviation of differences was estimated to 2cm.