Research on Large Navigation Leo Enhanced Constellation

Abstract

As GNSS applications continue to deepen and user needs continue to diversify, the pursuit of higher navigation and positioning accuracy and navigation and positioning speed has become an urgent need for future users. LEO satellites have unique advantages in enhancing the precise orbit determination of GNSS satellites and shortening the time for the first fix of PPP. Especially in the context of future navigation warfare, in order to meet the needs of different users for real-time and accurate positioning, navigation, and timing, it is imperative to use low-orbit constellations to enhance mid-to-high orbit constellations. Therefore, it is necessary to carry out research on the low-orbit constellation configuration.

Based on the research and analysis, based on user needs, this paper adopts semi-analytical constellation optimization design method to optimize the low-orbit constellation design based on user needs and achieves user needs at the minimum cost, and gives the optimal constellation configuration. The constellation coverage characteristics are simulated and the results are given. The low-orbit constellation given in this article not only meets user needs, but also has better scalability. The research results of this paper are intended to provide a useful reference for the construction of the next-generation GNSS LEO constellation.