what is the difference between gps and differential gps (dgps)?
The GPS and DGPS are the satellite-based navigation systems. The basic difference between GPS and DGPS lies on their accuracy, DGPS is more accurate than GPS. DGPS was intentionally designed to reduce the signal degradation. GPS provides the accuracy about 10 meters, but DGPS can provide accuracy around 1 meter, even beyond that 10 cm.
Key Differences Between GPS and DGPS In GPS, there is a standalone receiver which receives signals from the satellite whereas in DGPS there are two receivers, reference receiver and rover (user) where rover receives a calibrated signal from the reference receiver (fixed base station).