该程序用于计算卫星轨道和绘制卫星运行轨道轨迹图。-This program is used to compute the satellites circle and draw the picture of the satelites.

GPS定位采用UKF滤波方式。包括调用的数据dat文件（选用卫星数据和机动目标运行轨迹数据）和调用的sigma点生成子程序。运行可观察定位误差（位置、速度和加速度）-GPS positioning using UKF filtering method. The data include call dat file (optional operation of satellite data and maneuvering target trajectory data) and the sigma

航天卫星轨道运行计算，输入轨道根数或初始位置和速度，输出运行轨迹，并绘出三维图像。-Space satellite orbit calculation, enter the number of the track or the initial position and velocity output running track, and draw a three-dimensional image.