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Considerations on the Establishment of DGPS System in China

Chen Junyong;Hu Jianguo(National Bureau of Surveying and Mapping,Beijing, 100830;Chinese Academy of Surveying and Mapping, Beijing, 100039)  
The concept and behaviours of the local area and wide area differential GPS,as well as their augmentation systems are briefly introduced. The importance and the necessity for the establishment of wide area DGPS real time positioning system in China are discussed.
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