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The Local Area Augmentation System (LAAS) will augment the GPS and complement WAAS by
providing an all-weather approach, landing, and surface navigation capability. It is
expected that the end-state configuration will pinpoint the aircraft's position to within
one meter or less. Curved approach paths, not possible using the current instrument landing
systems, will be possible for Category I, II, and III precision approaches as the system
evolves. Increased accuracy will allow more arrival and departure procedures. Approaches will
be designed to avoid obstacles, restricted airspace, noise sensitive areas, or congested
airspace. Similar to WAAS, LAAS works by monitoring the GPS signal, but in the case of LAAS,
sends corrections directly to the aircraft. This not only provides greater integrity but also
much quicker alerting.
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