Plain English Meaning

A landing approach where the airplane follows GPS-based guidance to the runway, with a ground station at the airport sending corrections that make the GPS accurate enough to fly down to landing minimums.

Full Definition

A precision instrument approach that uses a Ground-Based Augmentation System (GBAS) to provide GPS corrections and integrity data to the aircraft, enabling lateral and vertical guidance to a runway with accuracy comparable to an ILS. A single GBAS ground station at an airport supports to by broadcasting signals via to suitably equipped aircraft.