卫星绕地球旋转的动态工程。刚才上传的是静态的，这个加了rotatle后的动态过程，代码都加了注释，在vc下编译通过。注意事项请看上个上传得文件。-satellite orbits around the Earth's dynamic works. Just upload a static, the increase rotatle after a dynamic process and increase code, a footnote under the vc compile. See Note in the last upload documents.