There exists a slope drift in an integral gyro when it is used as an azimuth gyro, which may cause serious heading and position errors in the Inertial Navigation System (INS).
Azimuth Angle is calculated exactly through two-position method and constant drift of gyroscope is cancelled.
通过双位置方法准确计算出载体的方位角，并且抵消了陀螺的常值漂移对寻北精度的影响。
3
This method solves the problem of rapid azimuth alignment on the moving base, dramatically reduces the requirement of carrier's movement and gives a means of measure gyroscope drift.