Design and Verification of Long-Term Reliable Autonomous Navigation System of Navigation Satellite

Beidou-3 global navigation satellite system (GNSS) has the capability of autonomous navigation. Without the support of the ground system for a long time, it uses the pre-recorded ground auxiliary data, with the help of intersatellite/satellite-ground measurement, intersatellite/satellite-ground data exchange and the processing of the satellite autonomous navigation software to ensure the autonomous and stable operation of the navigation system. Autonomous navigation service is built on the complex dynamic network system of satellite and ground station, involving diverse system equipments and complex information process. In order to ensure the long-term, high-precision and reliable service capability of autonomous navigation, it is necessary to adopt various means in the design of satellite autonomous navigation to improve the reliability and robustness. In this paper, the profile analysis of autonomous navigation long-term operation scenario is carried out, and the on-board realization of autonomous navigation satellite system is designed by combining the working mode, adaptive data processing, intelligent start synchronization and other technologies, the design of the autonomous navigation system on the satellite was researched. Also the autonomous navigation reliable operation ability was validated based on long-term tasks, abnormal interactions between satellites, constellation refactoring conditions.