Global Positioning System

• ìPlainî civilian GPS

  • Horizontal accuracy of ± 100 m
  • Vertical accuracy of ± 150 m

• Differential GPS

  • Horizontal accuracy of ± 2 m
  • Vertical accuracy of ± 3 m
  • Requires a differential base station within 100 km

• Real Time Kinematic GPS

  • Horizontal accuracy of ± 2 cm
  • Vertical accuracy of ± 3 cm
  • Requires a differential base station within 10-20 km

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