subastral meaning in English
adj.
星下的，天下的，地上的。
Examples
- 3 . expatiated on the application theory of basic orbit , including subastral point calculation , visibility analysis , coverage evaluating and spacecraft life - span estimate
3 、阐述了基本轨道应用分析理论，包括星下点轨迹计算、可见性分析、覆盖评估和轨道寿命估算。 - 4 . realize the render and display of subastral point tracks on the global satellite images . also include the display of satellite coverage ; realize the render of the three - dimension scene in which satellites orbiting the earth , including the render of satellite track and satellite model ; realize the render of scene based on the ground viewpoint , including the render of sky background , satellite ana satellite track
4 、实现了在全球卫星影像地图上卫星的星下点轨迹的绘制和显示,以及覆盖区域的显示;实现了卫星围绕地球旋转的三维场景显示、卫星轨迹显示以及卫星模型显示;实现了以地面观测站为观测视点的场景显示,地面以及天空背景显示,卫星及卫星轨迹显示。 - So combine the item of “ space targets surveillance photoelectricity telescopes arrays system ” , this thesis does research in developing space targets visualization system . the main achievement in this thesis can be summarized as follows : 1 . expatiate e the basic theory of satellite track dynamic , analyse the orbit characteristic of two - body problem and launch window , subastral point calculation , visibility and coverage analysis , two - line element sets
本文结合“空间目标监视光电望远镜阵系统”课题,进行了空间目标可视化系统的设计和研究,主要作了以下几方面的工作: 1 、阐述了卫星轨道动力学的基本原理,分析了二体轨道特性和发射窗口的基本特性,星下点轨迹计算、可见性和覆盖分析和两行根数。