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给出了在考虑阻力系数为速度的函数的情况下， 并将大气密度进行分层计算时， 估算再入飞行器弹道主要参数的一组解析式。按上述方法进行了仿真计算， 并将计算结果、Ｂａｒｂｅｒａ解、有关文献解同数值解进行了比较。结果表明， 由于大气密度采用分层计算， 更真实地反映了飞行器的再入环境， 解析估算值较其它两种解更接近于数值解， 完全可用于再入飞行器的再入弹道初步估计和再入性能分析。
A set of analytical formulas for estimating the main parameters of the reentry vehicle trajectory when considering the drag coefficient as a function of velocity and stratifying the atmospheric density are given. The simulation is carried out according to the above method, and the results of the calculation, the Barbera solution and the related literature solutions are compared with the numerical solutions. The results show that because the density of atmosphere is stratifiedly calculated, the reentry environment of the aircraft is more truly reflected. The analytical estimates are closer to the numerical solution than the other two solutions and can be used in the initial reentry trajectory reentry estimation and then Into performance analysis.