***Meaning*** :: <u>W</u>ide <u>A</u>rea <u>A</u>ugmentation <u>S</u>ystem ***Definition*** :: A differential global positioning system (DGPS) that improves the accuracy of the system by determining position error from the GPS satellites, then transmitting the error, or corrective factors, to the airborne GPS receiver. ***Source*** :: [[IFH]] Glossary ***Video Overview***: > [!youtube] Published by [@FAAnews](https://www.youtube.com/@FAAnews) >  > [!note] From[ FAA Site](https://www.faa.gov/about/office_org/headquarters_offices/ato/service_units/techops/navservices/gnss/waas/howitworks) > This animation shows the step-by-step process of how the WAAS works. The animation contains no audio. #glossary #acronym