The time distribution system for the wide area augmentation system (WAAS)

摘要

This paper describes the functions, requirements, and objectives of the Time Distibution System (TDS). It should be pointed out that the WAAS TDS has not yet been developed because it is a componentof the final phase of WAAS development. However, WAAS Phase 1 allows for the inclusion of the TDS into the WAAS if it is developed before the final phase of WAAS. The TDS will be located at the U.S. Naval Observatory (USNO). It will be used to provide the offset data between WAAS Network Time (WNT) and Coordinated Universal Time (UTC). The offset data will then be passed on to the WAAS Master Station (WMS) for transfer to the Geostationary Uplink Station (GUS) and broadcast to users of precise time through the WAAS Signal-in-Space (SIS).