In real-time network RTK GPS surveys, network corrections are provided by several permanently operating reference stations.

• A. Uses a single temporary base station
• B. Uses multiple permanently operating reference stations
• C. Uses multiple temporary base stations
• D. Uses a single permanent base station

Answer: (B)

Network RTK relies on a distributed network of fixed, permanently operating reference stations spread over the area. Each station continuously records satellite signals, and a central processor uses all the data to model common, location-dependent errors such as satellite orbits and clocks, and atmospheric delays. The resulting corrections are then interpolated to the rover’s position in real time, giving centimeter-level accuracy over a wide region, not just near a single base. Using a single base or temporary stations cannot capture how errors change with location, limiting accuracy and reliability as you move away from the base. That continuous, multi-station, permanent setup is what enables real-time network corrections.