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