The highest accuracy in {HEAD ~ time} is acquired for pinpoint light sources, {TAIL ~ whose transmission duration} is of the same order of size as that of the line transfers 
The highest accuracy in { HEAD ~ time } is acquired for pinpoint light sources , { TAIL ~ whose transmission duration } is of the same order of size as that of the line transfers
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH