Halo orbit locates about the libration point in the Sun-Earth system and has no orbital plane focusing the Earth,which makes the attitude description and dynamics modeling for Halo-orbit spacecraft is quite different from that for the usual satellite around the Earth.

The photogravitational restricted three-body problem in which the mass reduc-tion factors of two primaries q_1,q_2∈(-∞,1]are studied and an analytic method to estimate the number of libration points and to calculate their location is given in this paper.

Libration point orbits have the important applications in deep space exploration,and have been paid more attentions from all over the world.

The paper suggests a linear stability field of triangular libration points in the circular restricted three-body problem when a main body is a source of radiation, and discusses the effect on the linear stability of triangular libration points in the classic circular restricted three-body problem under radiation pressure and the existence and stability of collinear libration points.

Linear Strategy for Positioning of Spacecraft around the Collinear Libration Points;

On Orbit Control of Spacecraft around Collinear Libration Points;

Collinear libration points of the Earth-Moon system are unstable,so spacecrafts need orbit control to stay around them.

It also put forward a project based on dynamic-zero for data collection and designed the anti-jamming scheme include hardware and software, which guarantee the reliability of the system.