Information here is useful in understanding the limitations of GPS accuracy, as well as looking at some of the ways to improve it (I say some as I didn't see GL

Information here is useful in understanding the limitations of GPS accuracy, as well as looking at some of the ways to improve it (I say some as I didn't see GLONASS mentioned). http://www.gps.gov/systems/gps/performance/accuracy/ http://www.gps.gov/systems/gps/performance/accuracy/