The mutifunctional precise satellite positioning system on area of Poland ASG- -EUPOS testing activation with the beginning of June 2008 gives opportunity to realize geodetic jobs in real time RTK GNSS (NAWGEO service) on whole country. The ASG- -EUPOS system establish unified in whole country and invariable coordinate system. Points heighs determination with use of ASG-EUPOS system guarantee (according to system owner) to achieve requirements for all groups of precission. In accordance with obliging regulations points height should be determined with reference to nearest reference point and the precission criterion for heights is position error in reference to nearest benchmarks. In this work height determination methods were analysed in contex of ASG-EUPOS system technical capabilities and legislative-technical conditions following to obliging and designed technical standards. Final effect is the measurement methodology proposal to determine normal heights in real time with use of NAWGEO service from ASG-EUPOS system and precision evaluation simultaneously. Moreover, available quasi-geoid models and methods of its transformation in purpose to realise height measurements in ASG-EUPOS system were analised.

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