Accuracy of differential GPS by latitude-and-longitude correction for positioning in fixed and moving conditions

"The positioning accuracy of differential GPS by latitude-and-longitude correction is reported in this paper. Evaluation of this system was conducted in Perabuhan Ratu, in Indonesia. Experiment conditions included fixed conditions on land and moving conditions at sea during a maneuvering trial of a research vessel. The correction value for latitude and longitude in both cases was measured at a DGPS reference station established in a fixed point on land. The positioning accuracy of this system during the experimental period was very high when compared to that uncorrected GPS position. The positioning error determined on land was about 2.0m in terms of standard deviation. And it was confirmed that this system is also useful in moving conditions."