Abstract
This paper describes a multiple-reference-station DGPS system using a geostationary satellite-based data link. The role of multiple reference stations in improving DGPS accuracy is discussed. Operational multiple-reference-station DGPS results are presented. They are compared with standard DGPS results on short and long baselines. The results demonstrate the system capability of maintaining 2.5 m (1-sigma) horizontal position accuracy (about the mean error) at long distances up to 1000 km from the reference stations.
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