为了正确评价应用卫星与卫星应用技术的社会经济效益，必须建立一套科学的评价理论。

To evaluate correctly the social and economic effectiveness of ap-plication satellite and satellite application technologies, it is necessary to erect a set of scientific evaluation theory.

民用航天在应用卫星 、 运载火箭技术 、 载人航天等方面取得长足进步.

Civil aerospace tech - nologies have made remarkable achievements in the applied satellite, carrier rocket, and manned spaceship.

应用卫星姿态动力学方程，建立了基于欧拉角描述的姿态确定估计模型。

With the dynamic model of satellite's attitude applied, the estimate models of attitude determination based on Euler angle method are presented.

应用卫星姿态运动学方程，建立了基于欧拉角描述的姿态确定估计模型。

With the kinematic model of satellite's attitude applied, the estimate models of attitude determination based on Euler angle method are presented.

通过应用卫星重力测量仪器和追踪地震导致的地壳变形，地质学家能够准确的预测将要发生的地震会发生在什么地方（但不能测出什么时候发生）。

Geologists can accurately predict where (but not when) the next earthquake will happen by using satellite gravity measurements and tracing ground deformation caused by earthquakes.