Differential GPS

Differential GPS (DGPS) is an enhancement to the Global Positioning System (GPS) that provides improved location accuracy by correcting the signals received from GPS satellites. While standard GPS can provide accuracy within about 10 to 20 meters under ideal conditions, DGPS can improve that accuracy to within 1 to 3 meters. ### How DGPS Works: 1. **Reference Stations**: DGPS relies on a network of fixed ground-based reference stations that know their exact position.