基于OpenGL的卫星覆盖可视化仿真,通过轨道分析了三维和二维显示，星下点-OpenGL-based visual simulation of the satellite coverage through the three-dimensional and two-dimensional orbital analysis shows that the nadir

生成卫星的星下点轨迹，matlab编程，用于SAR覆盖分析(Subastral point, generation of satellite matlab programming for SAR coverage analysis)