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. Further areas with tall trees and mountains may not be able to receive the WAAS signals. WAAS signals are easy to receive for open land and marine applications. An advantage WAAS has over differential GPS system is that WAAS gives coverage both inland and offshore whereas DGPS is entirely land-based. Further, unlike DGPS, WAAS does not need additional receiving equipment.

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