What is the expected range of errors?
A. For an ideal magnetic tracker, there are no positional measuring errors. Wherever you move a sensor in the motion box, it measures position and orientation without error. That is to say errors do not vary throughout the motion box because each individual sensor perfectly measures its position coordinates. In the real world, however, position and orientation errors vary in magnitude throughout the motion box. These errors are caused by the designer’s inability to design a perfect measuring machine. Errors can also be produced by environment factors, such as metal in or near the motion box. Depending on the composition and size of this metal, it can distort the magnetic fields and cause varying errors in the motion box. These errors are static errors. In other words, if you move away from a location and return to it, the sensor will always measure the same error at this location. If you move to a different location, you will measure a different but still repeatable error. Errors do no
