The media position monitoring system 1 wherein said portion of said {HEAD ~ media} initially moved across said {TAIL ~ light sensitive surface} comprises a two dimensional area, whereby said map comprises a two dimensional pattern of media density values and media position monitoring system determines a two dimensional media position 
initially moved across
The media position monitoring system 1 wherein said portion of said { HEAD ~ media } initially moved across said { TAIL ~ light sensitive surface } comprises a two dimensional area , whereby said map comprises a two dimensional pattern of media density values and media position monitoring system determines a two dimensional media position
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL REL OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH