{HEAD ~ The road side data exchange device} includes a positioning system for receiving satellite data regularly, {TAIL ~ a calculator} for calculating a calibration value of the satellite data to generate an analyzed result data, and a database for storing the analyzed result data 
includes
{ HEAD ~ The road side data exchange device } includes a positioning system for receiving satellite data regularly , { TAIL ~ a calculator } for calculating a calibration value of the satellite data to generate an analyzed result data , and a database for storing the analyzed result data
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