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A trajectory planning based on characteristic parameters fitting for the multi-ground targets of the ground tracks of two satellites

HUANG Xiongwei1,2, WANG Shuquan1, ZHANG Yang3, HE Shengmao1   

  1. 1 Key Laboratory of Space Utilization, Technology and Engineering Center for Space Utilization, Chinese Academy of Sciences. Beijing, 100094, China;
    2 University of Chinese Academy of Sciences. Beijing, 100094, China;
    3 Aerospace Information Research Institute, Chinese Academy of Sciences. Beijing, 100094, China
  • Received:2022-03-30 Revised:2022-06-21 Online:2022-06-27

Abstract: In order to solve the problems of the ground tracks of satellites for earth observation with multiple orbital maneuvering capabilities, multi-detection targets, and multi-detector coordination, a fast calculation method of the ground tracks of satellites based on characteristic parameter fitting is proposed. An optimization model is established based on the database about the splicing method of the ground tracks of satellites. Firstly, the characteristic parameters describing the ground tracks of satellites are analyzed and refined, and polynomials to fit the characteristic parameters are used to achieve fast calculation. Then an observation code database is established according to the detection target, and the database is further organized into a trajectory database. Finally, an optimization model based on the trajectory database is established to solve all problems on the ground tracks of satellites. The simulation of fast full coverage task for fixed target in CTOC11 can be completed within 19.19 days. The results show that the design method and scheme adopted in this paper can be used for the design of ground tracks of satellites in various near-circular orbits. It is of great significance for the orbital design of earth observation satellites.

Key words: earth observation, the ground tracks of satellites, characteristic parameter fitting, database, trajectory planning, CTOC

CLC Number: