From: johnb@giskard.rdt.monash.edu.au (John Baker)
Subject: ONLINE: Technical Report - VR Tracking Systems
Organization: Monash University
Keywords: Virtual Reality, Tracking
Summary: VR Tracking system

After some requests, I'm posting the location my tech report which
describes some VR tracking systems and one I built in 1993.

http://rdt.monash.edu.au/~johnb/

or 

ftp ftp.rdt.monash.edu.au          /pub/techreports/RDT/94-12.ps.Z

All queries etc  Email : johnb@rdt.monash.edu.au