Head orientation sensing system

Appareo Systems, LLC, proposes to develop a functional prototype head-mounted position and orientation system (HPOS). The HPOS will be capable of operating in electromagnetic fields of up to 200 volts/meter and will provide at least one degree of accuracy and at least one degree of resolution at a 60 Hz update rate while providing 3 degree of freedom (DOF) information on head orientation, including azimuth from 0 to 360 degrees, elevation from +90 to -90 degrees, and roll orientation from +180 to -180 degrees. The completed HPOS system will include the development of a degradation-resistant GPS solution, which is seen as the key to the success of this project. Techniques including the use of ultra-short baselines and multiple GPS receivers and antennas will be explored to create the GPS reliability needed. Aided, non-GPS solutions simply cannot stand up in the variety of environments in which the HPOS must be deployed. It is believed that a GPS-dependent solution, although not without its own weaknesses, can be successfully implemented using the approach defined herein.