flock of birds
Measures 3D position and orientation
Consists of largish transmitter & small receiver connected to the same controller
Receiver picks up orthogonal magnetic fields from transmitter (details unknown)
Specs claim 0.02”/0.1o precision over 10’ area
- Not really that good; and metal screws it up
- Magnetic field falls off as r4 (?)
Mostly head tracking apps & similar
http://www.ascension-tech.com/products/flockofbirds