In recent years, the development of deep space exploration has made great progress. The deep space exploration activity in China started in the chang`e-1 lunar exploration in 2007. The deep space exploration has gone through 12 years and has achieved fruitful results.A large number of lunar images,information such as the space environment and space weather is transmitted back to Earth, providing a basis for us to study the moon. In this paper, based on the chang`e-4 relay satellite——magpie bridge satellite laser ranging, the related research is carried out.The article first briefly describes the background and significance of the magpie bridge satellite. This paper introduces the working conditions observation equipment and current observation equipment to be used in the magpie bridge satellite laser laser ranging. The mechanical basis for calculating the target orbit of the magpie bridge satellite is also introduced, including the selection of the model of the research object and the corresponding dynamic equations, the position of the libration point and the Jacobian constant used to measure the energy and flight range of the spacecraft.Then based on the basis of orbital mechanics, the target halo orbit corresponding to the satellite relay communication task of the magpie bridge satellite is calculated by numerical method. The calculated halo orbit is used to approximate the running orbit of the magpie bridge satellite to analyze the laser ranging. The dynamic characteristics of the halo orbit are extended, including the magnitude of the target orbital velocity that affects the telescope tracking during the satellite laser ranging, the orbital operation period and the invariant manifold near the halo orbit. .Next step, the calculated target halo orbit is used to analyze and calculate the laser range of the magpie bridge satellite: the maximum distance and the minimum distance of the magpie bridge satellite distance observation station are calculated. In the laser ranging. For better analysis of the lunar reflected light noise,the minimum distance and the minimum vertical distance between the magpie bridge satellite and the moon are calculated.Finally,in the absence of the actual measurement of the bridge laser laser ranging, the equivalent test verification scheme was designed under the conditions allowed by the observation equipment. The reliability of the theoretical analysis calculation is verified by the measured results, which provides a theoretical basis for the subsequent development of the magpie bridge satellite.
修改评论