What is LAAS (local area augmentation system)?

The Local Area Augmentation System (LAAS) will expand the Global Positioning System to give an all-climate approach, landing, and surface route ability. LAAS will give very high exactness, accessibility, and integrity necessary for Category I, II, and III precision approaches. The advancement endeavors of the LAAS are centered around two principle regions: the LAAS ground equipment and the LAAS avionics.