中文说明：本程序是基本的三位置矢量定轨程序，用于在已知三个点的位置矢量后计算6个轨道参数，从而完成对航天器的定轨任务。计算三位置矢量定轨的程序，自己设计的，如有不对欢迎指正
English Description：
This program is a basic three-position vector determination procedures used in known locations of three-point vector calculation 6 orbital parameters, thus orbit the spacecraft mission. Procedures for calculation of three-position vector determination, of your own design, if not please correct me