The view is to the north of the station's ground track.
拍摄视角是空间站地面轨迹正北方。
A regional navigation constellation scheme composing eight IGSO satellites of ground track is presented in this paper.
提出了一个由八颗同地迹有一定倾角的地球同步圆形轨道(IGSO)卫星组成的区域导航星座方案。
To generate and realize 4D guidance in the terminal area, first there should be ground track , then the altitude profile and appropriate speed profile along the track.
末端区域4D导引应首先生成轨迹，然后生成沿该轨迹飞行的高度剖面、合理的速度剖面，最后生成自动引导飞机在规定时间着陆的4D导引指令。
Two kind of horizontal plane trajectories of the Acquisition Phase (AP), Tangential Trajectory and Arc Trajectory, are discussed and predictors of ground track range are given, respectively.
比较分析了两种捕获段水平面轨迹：切线轨迹和弧线轨迹。分别给出了两种轨迹的数学模型以及航程计算公式。
The digital simulation results show the ground track of the straight flight and the curve flight can be worked out with the key - in of only a few waypoints coordinates and constraint parameters.
数值仿真结果表明，该方法只输入少量的航路点坐标数据和限制参数，就能计算出沿直线和曲线飞行的水平轨迹。
The effect of rate of change for semimajor axis and inclination perturbation and drift of semimajor axis and inclination on the ground-track drift was analyzed.
分析了半长轴和倾角摄动变化率，以及初始半长轴和倾角偏置量对地面轨迹漂移的影响。
The effect of rate of change for semimajor axis and inclination perturbation and drift of semimajor axis and inclination on the ground-track drift was analyzed.
分析了半长轴和倾角摄动变化率，以及初始半长轴和倾角偏置量对地面轨迹漂移的影响。
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