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.
对于偏航角度，由于偏航角和重力方向正交，无法用加速度计测量得到，因此还需要采用其他设备来校准测量偏航角度的陀螺仪的漂移值。
For yaw, which is orthogonal to gravity, the accelerometers can't help you, so you need something else to correct your drifting yaw gyro.
本文推导了计及重力效应运动媒质中的次声波动方程和用速度的散度表示的分层大气模型下的频散方程；
The equation of infrasonic wave taking into account the gravitational effect in moving media is derived, with multi-layer atmospheric model.
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