Ace One is DJI's latest achievement in GPS based helicopter autopilot systems. It combines the highest level of positional data from GPS Satellites, a 6-DoF inertial measurement unit, magnetic field meter, and a barometric altimeter with the most robust algorithms in automation control theory. From aerial filming, surveillance, to wide area surveying, Ace One's exceptional performance excels in the most demanding industries and environments.

For more information:
http://www.dji-innovations.com/products/aceone/overview/#