Establishment of three-dimensional geodetic control by interferometry with the global positioning system

Physics

Scientific paper

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Celestial Geodesy, Global Positioning System, Interferometry, Network Control, Correlation, Navstar Satellites, Positioning

Scientific paper

The classical methods of establishing local and regional geodetic control are essentially not three dimensional, and the horizontal and the vertical problems are regarded as separate. Geodetic practices for the establishment of local and regional control have not yet been altered by the advent of the so-called extraterrestrial methods of geodesy. The reasons for this situation have been related to insufficient inaccuracy, cumbersome procedures, and cost factors. However, revolutionary changes are beginning to occur in connection with the signals provided by the Global Positioning System (GPS) satellites. An analysis of the 35-station Eifel network is discussed. It is found that radiointerferometric observations of the present, incomplete constellation of GPS satellites can yield reliable determinations of the relative position vectors between stations 10 km apart with uncertainties of 1 ppm in both horizontal coordinates.

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