DGPS

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작성자드립킹 조회 6회 작성일 2021-02-22 14:37:50 댓글 0

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How does DGPS Work?

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What is DIFFERENTIAL GPS? DIFFERENTIAL GPS meaning & explanation

Global Positioning System (GPS) is a space based navigation system that provides location and time information anywhere on earth. Differential Global Positioning Systems (DGPS) are enhancements to the Global Positioning System (GPS) which provide improved location accuracy, in the range of operations of each system, from the 15-meter nominal GPS accuracy to about 10 cm in case of the best implementations. Each DGPS uses a network of fixed ground-based reference stations to broadcast the difference between the positions indicated by the GPS satellite system and known fixed positions. These stations broadcast the difference between the measured satellite pseudoranges and actual (internally computed) pseudoranges, and receiver stations may correct their pseudoranges by the same amount. The digital correction signal is typically broadcast locally over ground-based transmitters of shorter range.

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