%0 Journal Article %T Comments to X. Li and Y. M. Wang (2011) Comparisons of geoid models over Alaska computed with different Stokes' kernel modifications, JGS 1(2): 136-142 %A L. E. Sj berg %J Journal of Geodetic Science %@ 2081-9943 %D 2012 %I %R 10.2478/v10156-011-0022-y %X Li and Wang recently compared geoid determination by various gravimetric methods for modifying Stokes' formula vs. using GPS/levelling geoid heights as a reference model. Possible large systematic errors in the differences of gravimetric and GPS/levelling geoid models deteriorate the results and conclusions. Moreover, spectral combination, the only stochastic method in the study, was applied in an unrealistic way. %K Geoid %K Stokes' formula %K Stokes' kernel modification %U http://versita.metapress.com/content/g251q60j68486j57/?p=563435110b6f45d285f500ee05d72c32&pi=4