an angle processing section for performing at least one of a displaying process and a correcting process, of said plurality of {HEAD ~ angle data} calculated in {TAIL ~ said angle calculating section} 
calculated in
an angle processing section for performing at least one of a displaying process and a correcting process , of said plurality of { HEAD ~ angle data } calculated in { TAIL ~ said angle calculating section }
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 REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL