考虑地球扁率效应的两圆轨道之间的双共切最优转移

两圆轨道之间的双共切转移轨道是其近地点和远地点分别在这两个圆轨道上的椭圆轨道。本文用两次冲量法给出了沿双共切椭圆轨道实现从一圆轨道向另一圆轨道转移的最优方案，并考虑到地球扁率造成的轨道摄动。文中的所谓圆轨道指的是变轨时刻的密切轨道为圆形的轨道，是对近圆轨道的近似替找。

Optimal Dual-Tangential Transfer Between Two Circular Orbits in Consideration of the Earth''''s Flattening Effect

The dual-tangential transfer orbit between two circular orbits is a special elliptical orbit that it's perigee and apogee are located at the two orbits respectively. The optimal scheme is given for the dual-tangential transfer between two circular orbits by dual impulse method. The orbit perturbation as a result of the Earth's flattening is considered. In the paper the circular orbit means that it's close-tangent orbil on the moment of obrit change is a circle,an approach for a near-circular orbit.