Research Progress of VLBI Technology and Application to China Lunar Exploration Project

The Unified S-Band (USB) measurement and control system with ranging and velocity measurement capabilities and the VLBI system with high precision angle measurement capabilities are jointly used to undertake the orbit determination for the missions. The measurement accuracy is increasing constantly. The orbit determination for Chang'E-1、Chang'E-2、Chang'E-3、Chang'E-4 and Chang'E-5 test spacecraft missions have been completed successfully. It has made important contributions to CLEP and laid a solid foundation for the subsequent exploration of the Moon and planets.