The collinear libration point of the Sun-Earth Circular Restricted Three-Body Problem (CR3BP), L 3 $L_{3}$ is located opposite to the Earth with respect to the Sun. Whereas several space missions have been launched to the other two collinear equilibrium points, i.e., L 1 $L_{1}$ and L 2 $L_{2}$ , the region around L 3 $L_{3}$ is so far unexploited essentially because of the severe communication limitations caused by Sun’s blocking location. By using an adequate size, location and attitude of a solar sail, the equilibrium point can be displaced from its original location to allow direct communication between the satellite and Earth. This paper presents several families of artificial equilibria located on the semi-space which is permanently opposite to Earth in relation to the Sun, but which allows direct communication with Earth. We present a family of such equilibria which are linearly stable and therefore very useful for space missions.

中文翻译：

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太阳-地球-风帆问题中的一族线性稳定平衡

日地圆形受限三体问题 (CR3BP) 的共线平衡点 L 3 $L_{3}$ 相对于太阳位于地球的对面。虽然已经向其他两个共线平衡点（即 L 1 $L_{1}$ 和 L 2 $L_{2}$ ）发射了多项太空任务，但 L 3 $L_{3}$ 周围的区域迄今为止尚未开发主要是因为 Sun 阻止位置导致严重的通信限制。通过使用合适的太阳帆尺寸、位置和姿态，可以将平衡点从其原始位置移开，以实现卫星和地球之间的直接通信。本文介绍了位于半空间上的几个人工平衡系列，该半空间与地球相对于太阳永久相对，但允许与地球直接通信。