3 ms·
Nominal accuracy of "pure" GPS is 15 meters. Using Differential GPS (which uses additional signals from ground stations)gets you down to 10cm in the best case.
by brazzy 12y ago
Nominal accuracy of "pure" GPS is 15 meters. Using Differential GPS (which uses additional signals from ground stations)gets you down to 10cm in the best case.
There used to be an additional limitation called "selective availability" where the military deliberately introduced errors in the clock siginal to reduce accuracy to about 100m, but this was switched off in 2000.
- userbinator 12y agoNote that most modern GPS receivers usually achieve much better than 15m accuracy in normal use. http://www.gps.gov/systems/gps/performance/accuracy/ http://www.gps.gov/systems/gps/performance/accuracy/ I can personally say that ~1.5-2m accuracy is definitely achievable even with a cheap entry-level receiver like the ones integrated into smartphones, when there is a clear view of the sky and good weather. Edit: It seems my phone does have DGPS, so that accuracy is not just "raw GPS".
- cliveowen 12y agoThat's really outstanding, I didn't expect that.