The error correcting module 304 corrects {HEAD ~ the error} in the measured speed by subtracting {TAIL ~ the correction value} from the error 
by subtracting
The error correcting module 304 corrects { HEAD ~ the error } in the measured speed by subtracting { TAIL ~ the correction value } from the error
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH