UNITED STATES STANDARD FOR WIDE AREA AUGMENTATION SYSTEM (WAAS)
|Publication Date:||6 September 2002|
PURPOSE. This document specifies criteria for the Wide Area Augmentation System (WAAS) approach procedures where the value for the vertical alarm limit (VAL) is >12 meters and ≤50 meters. Approaches constructed under these criteria are termed "LPV." The lateral protection area is based on the precision approach trapezoid dimensions, and the vertical surfaces are structured around WAAS vertical performance given the stated VAL parameters.