Last Updated: 10/23/2012*

ATM - WAASRaytheon’s Wide Area Augmentation System (WAAS) is a safety-critical system that enables the Global Positioning System (GPS) to meet air navigation performance requirements for enroute, terminal, non-precision approach and precision approach phases of flight.

WAAS’ satellite based augmentation system provides safe and precise horizontal and vertical approach guidance to all runway ends without any ground equipment at the airport. Raytheon’s system provides reliable, all-altitude navigation signals, even in remote and mountainous areas.

WAAS expands the number of satellite ranging signals to significantly increase GPS navigation system availability. It monitors GPS performance and provides timely warnings to users when unsafe conditions exist to improve integrity. It also substantially increases the accuracy of the GPS and enables precision RNP RNAV operations.

WAAS was officially commissioned by the FAA for public aviation use on July 10, 2003. It enables WAAS enhanced navigation services and procedures that include LNAV, LNAV/VNAV, and LPV (APV-I) approaches with vertical guidance. In the United States, WAAS provides a CAT-I equivalent LPV200 approach capability with a 200-foot decision altitude. In addition, WAAS provides high integrity navigation signals for non-aviation users such as boaters, precision agriculture, crop dusters, surveyors, vehicle dispatchers and location services, cell phone 911 emergency services, hikers, and other personal recreation uses.

Raytheon provides life-cycle support and other services to improve service reliability and availability, and increase the coverage area through system enhancements.
 

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