Research on the autonomous avoidance technology of satellite applicable to the low-orbit giant constellations

At present, governments around the world and the organization are demonstrating how to deploy LEO communication constellations, such as Starlink, space-based information network and other mega constellations. With the satellite increasing quantity，it greatly increases the risk of satellite in orbit collision. In case of satellite collision early warning, the satellite depends on ground system early warning information, and then guides the satellite to avoid maneuver, the whole chain takes a long time and involves the coordination of multiple departments, multiple personnel and different links. The management cost is very high and the efficiency is low, which cannot meet the needs of orbit collision management of mega constellations .Autonomous avoiding of satellites on orbit is an inevitable trend. In this paper, we devise a scheme for satellite autonomic avoiding on low orbit mega constellations. By analyzing the orbit debris environment of spacecraft, its collision early warning theory is established, the strategies and methods for orbit avoidance are formulated, spacecraft warning software is based on continually update cata- -log database，what is also used for Orbit early warning and avoidance. It will provide technical support for the healthy on orbit operation of mega constellation in the future.