how to model the position tracking error what is the function of the ultrasound emitter where to put ultrasound emitter what software can you use to model the positioning error where are position tracking errors how to model pt error how to calculate pen position by random variable which algorithm can be used to model the position of a whiteboard which random variable can be used when predicting an accuracy of a position on an ultrasound screen? how to correct timing errors ____ can be modeled by a random variable can an ultrasound be used to track pen position what causes the timing errors in an ultrasound can random variables be used to modeled a position can timing errors be modeled from random variables how to model position tracking how to model time and accuracy of pen position can an ultrasound be used to predict the distance between a pen and a whiteboard what is the accuracy of a position-tracking algorithm? how does it work? why are there timing errors in predicting pen position