Abstract:Aiming at the requirements of real-time, continuity and high-precision positioning of navigation augmentation, we propose a design scheme of LEO constellation based on geometric analysis. Firstly, we determine the key elements of the scene where a single satellite covers the earth, and, by combining the specific conditions and geometric constraints, we obtain the basic parameters. Then, we propose a hybrid constellation design method, which comprehensively considers the influence of the earth’s non-spherical gravity on the satellite orbit to determine the parameter configuration of the hybrid constellation. Finally, the feasibility of the scheme is demonstrated through simulation experiments. The simulation results show that the constellation designed in this scheme can provide the navigation augmentation function that meets the user’s needs, and performs well in the coverage layer, geometric distribution and orbital stability of satellites, providing data support for the scientific development of LEO navigation augmentation field.