this file is very useful for student to calculate structures with MATLAB

用gui学生成绩查询系统，初学，有待改善 -Query system with a gui student achievement, beginner, need to be improved

这是用来计算儒略日，坐标转换，轨道设计等的matlab代码，适配于轨道力学课后代码示例(This is used to calculate the Julian day, coordinate conversion, orbit design matlab code, suitable for orbital mechanics after code example)