With continuous progress in the field of technology, nobody is satisfied with mediocre performance and average accuracy in tracking levels. As such, researchers and tech geeks have come up with plenty of ways to improve GPS accuracy at optimal costs.The current accuracy levels are fairly high, as they allow you to track the precise location of an object within a distance of 4 20 meters. But, when it comes to aviation and other similar applications, very high accuracy levels are required.Now, let us move on, and take a close look at the add on technologies that help in improving the accuracy of GPS readings.Differential GPS, often referred to as DGPS in short, allows you to improve the accuracy of GPS readings up to an excellent level of about one meter to three meters, which is a lot better than the regular reading levels of 4 20 meters.It makes use of a network of stationary GPS receivers, and it is quite similar to civilian system run by the US Coast Guard on most of the waterways, a