Satellite navigation of spacecraft in lunar orbit

The paper proposes a concept for constructing a satellite navigation system to support spacecraft in lunar orbits, Earth-Moon-Earth transfer orbits, as well as in near-Earth (up to ~1 million km) sections of deep-space orbits. The proposed concept envisages an expansion of the existing GLONASS system and the use of its infrastructure, as well as the ability to use as the end-user equipment the existing hardware with updated software. Run within the framework of the proposed concept were functional simulations of the navigation system for a lunar spacecraft, as well as for an object on the lunar surface. Accuracy and dynamic characteristics of the navigation solution for various system architectures were obtained, recommendations for selection of parameters for the satellite navigation system in question are provided.