In response to a track jumping command, {HEAD ~ a tracking servo output signal} is expanded onto {TAIL ~ an orthogonal space} to obtain simulation parameters corresponding to the tracking servo output signal 
is expanded onto
In response to a track jumping command , { HEAD ~ a tracking servo output signal } is expanded onto { TAIL ~ an orthogonal space } to obtain simulation parameters corresponding to the tracking servo output signal
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH