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The application of GPS technology that based on the tracking station

CHENG Chuan lu,GUO Chun xi,LU Jun,WANG Wen li,WANG Xiao rui(Geodetic Data Processing Centre, State Bureau of Surveying and Mapping, Xi'an 710054,China)  
With the improvemet of GPS satellite orbit positioning accuracy,the perfect of the data processing model and methods,and the software and instrument functioning, GPS technique has made extensive application and development in China. Now, China planed to set up Spatial Data Infrastructure, many regions has established or reformed the GPS nets. GPS technology based on tracking station model is introduced for classical method of set up the GPS net. An example is given out on analysis and compare the different projects of data procesing and observation time.
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