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Session B3: GNSS Augmentation Systems

WAAS at 15
Todd Walter, Stanford University; Karl Shallberg, Zeta Associates Incorporated; Eric Altshuler, Sequoia Research Corporation; William Wanner, William J. Hughes FAA Technical Center; Chris Harris, FAA WAAS Engineering Team; Robert Stimmler, Raytheon Company
Location: Grand Ballroom F
Date/Time: Wednesday, Jan. 31, 2:05 p.m.

Peer Reviewed

The Wide Area Augmentation System (WAAS) achieved Initial Operating Capability (IOC) in July 2003. At IOC, WAAS had 25 reference stations in the conterminous United States, Hawaii, Alaska and San Juan Puerto Rico, two master stations, and four uplink stations supporting two narrowband L1 only GEO satellites. Today, WAAS has 38 reference stations including four in Canada and five in Mexico, three master stations, and six uplink stations supporting three wide band L1/L5 GEO satellites. In addition to the architectural expansion, the FAA continued to evolve and maintain the algorithms, hardware and software. With WAAS now turning fifteen years of age, this paper takes stock of these modifications and details the improved service and integrity that has occurred since 2003.



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