{HEAD ~ Communication} with {TAIL ~ the nearest road side data exchange device} is performed via a preset communication protocol to acquire the satellite calibration data 
with
{ HEAD ~ Communication } with { TAIL ~ the nearest road side data exchange device } is performed via a preset communication protocol to acquire the satellite calibration data
HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH