DGPS provides navigation accuracy within what distance?

DGPS provides navigation accuracy within what distance?

• A. 100 meters
• B. 10 meters
• C. 1 meter
• D. 50 meters

Answer: (B)

DGPS improves position accuracy by using a fixed reference station that knows its exact location and broadcasts corrections to your GPS receiver. By comparing the reference station’s known position with what the satellites are reporting, the receiver can compensate for common errors like satellite clock and orbital inaccuracies, plus some atmospheric effects. Applying these corrections narrows the position error to about 10 meters in typical marine navigation use. The other distances are either too large for DGPS (50 or 100 meters) or imply a much more precise system (around 1 meter), which DGPS does not generally provide.

DGPS improves position accuracy by using a fixed reference station that knows its exact location and broadcasts corrections to your GPS receiver. By comparing the reference station’s known position with what the satellites are reporting, the receiver can compensate for common errors like satellite clock and orbital inaccuracies, plus some atmospheric effects. Applying these corrections narrows the position error to about 10 meters in typical marine navigation use. The other distances are either too large for DGPS (50 or 100 meters) or imply a much more precise system (around 1 meter), which DGPS does not generally provide.