GPS Accuracy Through WAAS And EGNOS

Although Americans have enjoyed the advantages of a differential GPS (DGPS) system to improve accuracy of GOS fixes, Europeans and Japanese will soon have their own methods. And the good news is that there is interoperability when it comes to navigation equipment. Read this article (subscription required) for a more detailed explanation of the various systems and there reasons for being in existence.
“The answer is good news for voyagers in European waters. The Europeans are implementing their own version of WAAS. Called the European Geostationary Navigation Overlay Service. This service will provide the same high-accuracy GPS corrections that WAAS does in North American waters. And the domain of improved GPS expands beyond that; a similar Japanese service, called MSAS will also provide satellite GPS corrections in the waters around Japan.”

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