Wide Area Augmentation System
The Wide Area Augmentation System is an air navigation aid developed by the Federal Aviation Administration to augment the Global Positioning System, with the goal of improving its accuracy, integrity, and availability. Wikipedia
Accuracy: 1.0 metre (3.3 ft)
Coverage: United States, Canada, Mexico
Current usable satellites: 3
First launch: 2003; 21 years ago
Operator(s): FAA
Regime(s): GEO (uses communication satellites)
Status: Operational