Plain English Meaning
A radio signal sent out from the airport on a VHF frequency that tells your aircraft how to correct GPS errors and follow the approach path accurately.
Full Definition
A signal transmitted on a VHF radio frequency from a Local Area Augmentation System (LAAS) ground station to nearby aircraft, carrying GPS correction data and approach path information used to fly precision approaches.
Context Anchor
Seen in Local Area Augmentation System approach discussions, where the aircraft receives - guidance from a ground station near the airport.