why need gps waas and gps waas benefit:The WAAS system has been developed by the Federal Aviation Administration (FAA) and the Department of Transportation (DOT) jointly for use in precision flight approaches. GPS alone is not sufficient to meet the accuracy levels FAA requires. WAAS was therefore developed to account for signal errors due to ionosphere disturbances, time errors, and satellite orbit errors. WAAS is also vital in getting information about the health of each satellite in the GPS network.
gps waas benefit
The WAAS coverage is currently confined to North America. …

what is gps wass(gps wass definition)?
GPS WAAS or Wide Area Augmentation System is a system of satellites and ground stations that work with GPS to improve the quality of signals and rectify errors. The quality of the signals can be up to five times better with WAAS. A GPS receiver with WAAS can give a position accuracy of within three meters. Further, WAAS does not need additional equipment or service fees.