As shown in FIG 2B, when {TAIL ~ an electronic device} 300 is near any road side data exchange device 210, the electronic device 300 may receive the analyzed result data Ar to achieve the effect of calibrating {HEAD ~ the GPS signal} to have more precise satellite positioning 
As shown in FIG 2B , when { TAIL ~ an electronic device } 300 is near any road side data exchange device 210 , the electronic device 300 may receive the analyzed result data Ar to achieve the effect of calibrating { HEAD ~ the GPS signal } to have more precise satellite positioning
OTH OTH OTH OTH OTH OTH OTH TAIL 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 OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH