A method and system for switching between high-code-rate inter-satellite links in an orbiting flight formation

Abstract

The present invention provides a high code rate inter-satellite link switching method and system for flying formations, comprising: Step 1: Establishing an orbital dynamics recursive model according to the satellite ephemeris of formation members; Step 2: According to the orbital dynamics Based on the orbital recursion state and load requirements in the recursive model, the formation member satellite attitude information estimation is completed; Step 3: According to the satellite attitude information estimation, calculate and judge the mutual visibility of each link antenna between the two satellites to be established in the formation; Step 4: According to the mutual visibility judgment results of the antennas of the links between the two satellites to be established in the formation, comprehensively distribute the inter-satellite link switching logic of the formation. The invention solves the problem of determining the multi-link antenna switching logic caused by the narrow beam field of view of the high code rate link, and has more general engineering practicability.

Description

technical field [0001] The invention relates to aerospace vehicle communication technology, in particular to a method and system for switching high-code-rate inter-satellite links of fly-around formations. Background technique [0002] With the development of aerospace technology, the application fields of satellites are all over the fields of remote sensing, navigation, communication and new technology experiments, and the scale of satellites has also developed from single satellites to double satellites and multi-satellites. Among them, the formation satellites mainly realize data acquisition, interaction, processing and analysis through inter-satellite collaboration. It can be seen that how to ensure the smooth and stable inter-satellite link is the key to the formation satellites completing complex space tasks. For this reason, especially for orbiting formation satellites, as attached figure 1 As shown, the switching algorithm of high code rate, omnidirectional and full...

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Problems solved by technology

[0004] The patent document with the publication number "CN104537202A" discloses a "Space Antenna Array Synthesis Method Based on Satellite Formation Coordination", which realizes inter-satellite link communication by cooperating to receive signals transmitted by the ground station at the same time by two formation GEO satellites. There are large forwarding delays and link gap problems, which cannot meet the omnidirectional and full-time communication link requirements of flying around formation satellites

[0005] The patent document with the publication number "CN108964740A" discloses "an omnidirectional inter-satellite communication link based on double-star orbiting formation", and the patent document with the publication number "CN108964740A" discloses "a design method for formation satellite inter-satellite communication system" , the above two patented methods are oriented to the design of the inter-satellite link system, and both realize the heterogeneous reception of formation inter-satellite data by using a pair of large field of view (180°) communication antennas to the sky and to the ground. This method cannot be applied to high-speed Under the narrow field of view feature of the inter-satellite link, as attached figure 2 As shown, the link acquisition and transmission conditions of

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