LEO constellation design based on improved NSGA-Ⅱ algorithm
GNSS satellites have a high orbital altitude and severe signal loss through space transmission,so they tend to be interfered and shielded.LEO satellites can compensate for this shortcoming and provide position-ing and navigation services as a backup or supplement to GNSS.The independently designed constellation can better meet the requirements of data transmission,coverage,and other aspects.The design of LEO constella-tions is studied based on the optimization algorithm.Firstly,the key factors such as orbit altitude,inclination,and constellation configuration are constrained according to application requirements.Then,the parameters of the constellation are optimized by the improved NSGA-Ⅱ(INSGA-Ⅱ)algorithm,and an LEO constellation that can realize the global navigation enhancement is designed.Finally,the performance of the constellation is ana-lyzed comprehensively through simulation,and the effect of navigation enhancement is verified.
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