What is the Local Area Augmentation System?

The Local Area Augmentation System (LAAS) is a ground-based augmentation system (GBAS) specified by the US Federal Aviation Authority for use at airports to augment the accuracy of GNSS-based navigation.

The LAAS focuses its service on the airport area (around 30-50km radius) for precision approach, departure procedures and terminal area operations. It broadcasts its correction message over a VHF radio datalink from a ground-based transmitter.

The FAA plans to replace legacy navigation systems with satellite based navigation technology and has decided that the LAAS is the most cost-effective alternative to legacy Instrument Landing Systems (ILS).

Receiver designs that are intended to work with the LAAS can be tested using Spirent's novel LAAS VHF data broadcast signal simulator, the GSS4150, which works in concert with the company's multichannel constellation simulators to provide complete coverage of the tests required for civil aviation applications.


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