The paper presents the evaluation results for the new Earth Gravitational Model EGM08 that was recently released by the US National Geospatiat Intelligence Agency. Tests were carried out using GPS network POLREF covering in uniform way the territory of Poland and precise traverse established by Institute of Geodesy and Cartography in 2005. Sites of POLREF network and sites of traverse were tied to the Polish vertical reference frame. Our results reveal that EGM08 offers a major improvement (more than 80%) in the agreement level among quasigeoidal, ellipsoidal and normal heights over the area of Poland, compared to the performance of previous combined GGMs for the same area.

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