Research on transfer alignment technology of inter-satellite laser communication based on ephemeris broadcast
With the rapid development of satellite technology and rocket carrying capacity,LEO(Low Earth Orbit)satellite broadband communication system equipped with inter-satellite laser communication technology has become a new trend.In order to maintain the accurate initial alignment and establish the link for inter-satellite laser communica-tion,ensure the stable signal transmission,reduce signal loss and interference,and improve the quality and reliability of communication,the process of initial alignment for inter-satellite laser communication is analyzed,and a new e-phemeris format and ephemeris broadcast format under the overall consideration of satellite resources is proposed in this paper.A highly reliable communication bus has been designed according to the communication requirements,giving full consideration to various working conditions in the process of inter-satellite laser link establishment process,which has greatly improved its achievement ratio and reliability.The results of on-orbit application prove that the design scheme is reasonable and feasible,which can guide the laser communication terminal to complete the initial alignment efficiently and rapidly,and realize the long-term stable chain building with the aid of ephemeris data,and has great significance for the future research and application of LEO satellite communication network.
inter-satellite laser communicationinitial alignmentstabilization and trackinguplink e-phemeris
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