Lesson 5: Mobile Mapping Fundamentals

Nicolas MalloyAuthor: Nicolas R. Malloy


5.31 Wide Area augmentation System


The federal aviation administration (FAA) implemented the wide area augmentation system (WAAS) for civilian aviation navigation. WAAS uses a series of wide area reference station (WRS) sites located at precisely surveyed control points. Information collected by each of the WRS sites is forwarded to the WAAS master station (WMS) and then uploaded to geostationary communication satellites. Geostationary satellites orbit the earth at the same rate as the earth’s rotation in order to maintain a constant position above the earth. These satellites broadcast the augmentation messages across the nation, available to any WAAS enabled GPS receiver.  WAAS is also known as Wide Area Differential GSP (WADGPS).

Wide Area Augmentation System (WAAS) by TetraTechAMT