该程序利用4阶龙格库塔方法解二阶常微分方程，该微分方程描述火箭发射时质心运动轨迹。-The program uses the 4th order Runge-Kutta method of second order ordinary differential equations, differential equations describe the mass center when the rocket trajectory.

这是一个计算光谱和发射光谱以及吸收系数的fortran版本的程序，可以实现光谱的相对强度的计算-This is a calculation and emission spectra and absorption coefficient of fortran version of the program, you can achieve the calculation of the relative intensity of the spectrum