An object of the present invention is to provide a frequency correction method and {HEAD ~ apparatus} which can obtain {TAIL ~ a stable and precise local oscillation frequency} 
An object of the present invention is to provide a frequency correction method and { HEAD ~ apparatus } which can obtain { TAIL ~ a stable and precise local oscillation frequency }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL