Plain English Meaning

EGNOS is Europe's version of WAAS. It listens to GPS signals over Europe, works out the small errors, and sends corrections to aircraft so the GPS position is more accurate and trustworthy enough to use for instrument approaches.

Full Definition

A satellite-based augmentation system (SBAS) operated in Europe that improves the accuracy, integrity, and availability of GPS signals by broadcasting correction and integrity data from geostationary satellites. EGNOS is the European equivalent of the U.S. Wide Area Augmentation System (WAAS) and supports en route, terminal, and operations down to .