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.

• 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。