Abstract: In response to the problems of multiple transmission error influencing factors and reliance on unidirectional timing in current time-frequency source disciplined control,this study investigates a remote time-frequency signal reproduction and disciplined control method based on GNSS co view,analyzes the relationship between satellite time difference and elevation angle,determines the size of satellite weight values,and proposes a fusion and verification scheme based on satellite observation elevation angle to reduce errors caused by multipath effects.A fusion disciplined control algorithm and implementation strategy were proposed,and a fusion scheme based on multiple GNSS systems was designed.The feasibility of the scheme was verified through multiple GNSS systems and multi frequency data fusion experiments,which improved the disciplined performance of time frequency sources.

Key words: Time frequency source, Discipline, Multi GNSS system fusion, Satellite elevation