结果表明，不确定的重力扰动向量是高精度惯导系统的一个重要误差源。
The results show that gravity disturbance vector is a major error source for high accuracy inertial navigation system.
由惯导系统的误差方程分析了扰动重力场的影响。
According to the error equation of INS, the influence of gravity disturbance is analyzed.
详细描述了捷联惯性导航系统（SINS）中加速度计和陀螺数据仿真的方法，并给出了求解扰动重力的算法。
The simulative methods about the data of accelerator and gyro embedded in SINS are described in detail, and the algorithm about the disturbing gravity is presented.
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