Ultratrak
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Ultratrak is a discontinued spatial tracking system from Polhemus intended for full-body tracking.
It tracks 6 degrees of freedom.[1]
Ultratrak consists of a 486-based Motion Capture Server unit which contains 4 to 8 motion capture boards (each board can support 2 receivers), a VGA controller, external synchronization board, and communications card. The base system comes with 8 receivers and up to an additional 8 receivers may be added to the system.[1]
Its maximum update rate is 60 hertz. Latency is about 12 milliseconds.[1]
There is a version called the Ultratrak 120 that has a maximum update rate of 120 hertz.[1]