Reference Systems Used in Global Navigation Satellite Systems
The global navigation satellite systems used today employ different reference systems to express ECEF coordinates of their satellites: GPS employs WGS84, whereas GLONASS makes use of PZ-90. Although the definitions of these two reference systems are similar, in practical realization there are offsets in both origin and orientation between these reference frames. This affects those users of satellite navigation systems, who want to make use of both systems for all the advantages that this combined use provides.
This poster looks at these two reference frames, their definitions, realizations and development. Furthermore, it looks at the importance of using a unified datum in satellite geodesy. It provides an overview of the efforts to integrate the WGS84 and PZ-90 reference frames and shows possible transformation parameters between these two frames.
KeywordsGlobal Position System Global Navigation Satellite System Reference System Coordinate Frame Transformation Parameter
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