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。

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The azimuth Angle change between the two units can be calculated by once operation according to the deviation angles and relative torsion angles measured with the units at each point.

在一次测量过程中，两组测量单元可以测出各自所在位置的井斜角和相对扭转角，由此可计算出两个单元之间的方位角变化。

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Accelerometer of platform is used to measure the attitude of carrier. Gravity component at two input axes of DTG is calculated. The Gyro drift model is made to compensate the azimuth.

通过安装在双轴平台上的加速度计测量载体姿态，并计算重力在陀螺两个测量轴的分量，建立了陀螺漂移模型，对方位漂移进行补偿。

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