The Revolution GS from True North Technologies LLC, Maynard, MA, is a strap-down electronic compass for commercial, industrial, and military users who need high accuracy, repeatability, and low power consumption in dynamic environments. The device adds 2 MEMS rate gyros to the company's standard Revolution compass to stabilize pitch and roll measurements. The compass combines a precision 3-axis solid-state magnetometer, 2 angular rate gyros, and a dual-axis electrolytic tilt sensor. Two sets of independent filters, one for pitch and one for roll, combine the gyro and sensor measurements to achieve the best results.
True North Technologies LLC