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Differential GPS

Posted 52 minutes ago
Lagos Island (Eko), Lagos State, Nigeria
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A differential global positioning system(dgps) is an enhancement to the global positioning system (gps) which provides improved location accuracy, in the range of operations of each system, from the 15-meter nominal gps accuracy to about 1-3 cm[1] 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.
The united states coast guard (uscg) and the canadian coast guard (ccg) each run dgpses in the united states and canada on longwave radio frequencies between 285 khz and 325 khz near major waterways and harbors.
  • Differential GPS
  • Differential GPS
  • Differential GPS
  • Differential GPS
  • Differential GPS
  • Differential GPS
  • Differential GPS
  • Differential GPS
  • Differential GPS
  • Differential GPS
  • Differential GPS
  • Differential GPS
  • Differential GPS
  • Differential GPS
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