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《Equipment for Geophysical Prospecting》 2007-03
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Several front issues about positioning technique

Yi Changhua  
The positioning technique includes positioning equipment and positioning signal service.Software receiver is characterized by a series of advantages such as miniaturization and flexibility,which represents future direction of GPS receiver.Grid GNSS is a positioning service having new idea presented on the basis of new generation of internet technique,which is general trend of spatial positioning service.
【CateGory Index】: P228.4
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