WADGPS
WADGPS is an acronym for Wide Area Differential GPS. It's a general term for solutions used to enhance GPS accuracy over large areas (e.g., North America or Europe).
WADGPS solutions usually use a network of ground-based stations that compare their precisely known location with locations calculated from GPS satellite signals. Any differences found can be used to create correction data that's broadcast from satellites.
WAAS, EGNOS, and MSAS are specific implementations of WADGPS.
See Also
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