摘要：This article describes development and testing of a novel time-keeping system for future architectures of satellite-based augmentation systems. It describes an operational test bed designed to support comparison tests and evaluation of the time-keeping system in light of existing SBAS programs and their requirements. In particular it will address the system design and performance validation of a new time-keeping system for a satellite-based augmentation system (SBAS) and the real-time test bed with which it was evaluated. This time-keeping system could provide increased time-synchronization performance for future upgrades of both the onboard and ground segments of SBAS systems
