It is proposed to implement the concept for the novel head-tracker system, developed under Phase I, which was developed to achieve .5 min accuracy and 240 hz sampling rate desired by ntsc. As such, it will be much more accurate and faster than any other head tracker currently available. Key feasibility experiments were carried out under Phase I which support the assumptions on which the design for the Phase II effort is based. It is proposed to develop a finished head-tracker product under Phase II, and install it in the ntsc simulator.