reference orbit

For evaluating the risk of satellites formation efficiently, quasi maximum instantaneous collision probability was defined. ( 3) Assuming a circular reference orbit, the safety evaluation criteria was figured out based on the collision probability.

为更有效的评估编队卫星碰撞危险程度，定义了拟最大瞬时碰撞率。（3）在圆参考轨道的假设下，基于碰撞概率制定了一套防碰撞安全评判准则。

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Numerical simulations show that the spacecraft with the symplectic guidance algorithm can follow the reference orbit precisely under the deterministic velocity errors or the random velocity errors, and obtain the satisfying terminal control accuracy.

结果表明：无论确定性速度误差还是随机速度误差，实时制导保辛算法能够保证航天器很好地跟踪标称参考轨道并达到满意的终端控制精度。

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As the satellite's pre launch Lab calibration had a reference on the in orbit environment temperature changes of FY 2A, its calibration is ideal.

FY2B发射前的地面实验室定标方案参照了FY2A在轨环境温度的变化情况，定标结果十分理想。

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Ideal satellite formation configuration with an elliptic reference orbit

椭圆参照轨道的理想卫星编队队形设计

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For elliptic reference orbits, the variation of the relative trajectory is dependent on the eccentricity of the reference orbit and the initial true anomaly and that only one parameter group can provide the desired trajectory.

对于椭圆参考轨道编队，编队队形的变化与主星的轨道偏心率及编队初始真近点角的选择密切相关，且满足队形要求的从星运动参数组合是惟一的。

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The distinct trait of sun synchronic orbit satellite is that there will be the same sun conditions in the subpoint of the satellite wherever the satellite is, it benefits the earth reference equipments.

太阳同步轨道的主要特点是卫星在任一时刻其星下点的阳光条件基本相同，这对卫星上对地仪器的工作是非常有利的。

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Calculation of the Reference Orbit of CHAMP by Gravitational Potential Model

利用地球重力场模型计算CHAMP卫星参考轨道

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The paper developed the beam-based alignment ( BBA) system which settled the stable reference orbit for the storage ring of Hefei Light Source ( HLS).

本文研制的基于束流准直系统为合肥光源电子储存环提供了稳定的参考轨道，并且在研制过程中对轨道的不稳定性进行了相关的实验和分析。

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This method provides better accuracy than approaches that modify the initial conditions of the C-W equations for a circular reference orbit.

与对圆参考轨道的C-W方程初始条件进行修正的方法相比，该方法有更高的设计精度。

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