摘要
星下点是卫星运动在地球表面的投影,其轨迹是将一段时间内卫星在地面投影的连线。该文首先介绍了OpenGL图形库的体系结构和绘图原理,然后利用两行轨道根数(TLE)文件,采用SGP4/SDP4模型计算卫星星下点的地理经度、地理纬度和卫星高度。使用等距墨卡托投影,将卫星的星下点轨迹绘制在地球平面图上。该文详细说明了运用OpenGL图形库绘制卫星星下点轨迹的具体步骤和关键技术,最后给出了多种不同形状的卫星星下点轨迹效果图。
The sub - satellite point is the moving satdlite＇s projection on the surface of the earth, the track of which is the join of the satellite＇s projections in a period of time. The article introduces the architecture and the principle of the OpenGL at first, then introduces SGP4/SDP4 model to calculate the geography longitude, latitude and the satellite altitude with the input file of TLE. The track of sub - satellite points are drawn on the ichnography of the earth with the projection of Mercator. Finally the article explains the detailed steps and the key technique of how to draw the track of sub - satellite points and shows some different shape tracks of sub - satellite points.
出处
《计算机仿真》
CSCD
2006年第3期24-26,144,共4页
Computer Simulation
基金
国家863高技术研究发展计划资助(2003AA703140)
