Wide Area Augmentation System
From EUROCONTROL ATM Lexicon
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Abbreviation
WAAS
Definition
a GPS-based navigation and landing system that provides precision guidance to aircraft at thousands of airports and airstrips where there is currently no precision landing capability.
Definition Source
FAA (2009) homepage, Navigation Services, URL: http://www.faa.gov/about/office_org/headquarters_offices/ato/service_units/techops/navservices/gnss/hill/index.cfm#waas
Note
Systems such as WAAS are known as satellite-based augmentation systems (SBAS). WAAS is designed to improve the accuracy and ensure the integrity of information coming from GPS satellites.
