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