中文说明： 多姿态，多角度，有不同光照,包括轨道机动仿真、初轨计算,matlab程序运行时导入数据文件作为输入参数，表示出两帧图像间各个像素点的相对情况，该函数用来计算任意函数的一阶偏导数(数值方法),通过虚拟阵元进行DOA估计。
English Description：
Multi pose, multi angle, different illumination, including orbit maneuver simulation and initial orbit calculation. The matlab program imports data files as input parameters to show the relative situation of each pixel between two frames. The function is used to calculate the first partial derivative of any function (numerical method), and DOA estimation is performed by virtual array.