Abstrait

Testing RTK GPS Horizontal Positioning Accuracy within an Urban Area

Ismat M Elhassan

Today, advanced GPS receivers are improving the accuracy of positioning information, but in critical locations such as urban areas, the satellite availability is limited due to the signal blocking problem, which degrades the required accuracy. The objective of this article is to evaluate the horizontal positioning accuracy of a Real Time Kinematic Global Positioning System (RTK-GPS) available at the surveying engineering program laboratory in the civil engineering department at King Saud University, using RTK technique. To accomplish this task, a reference network of eleven control points within King Saud university compass area was established in an almost limited open area to work as an accuracy testing reference. The GPS was used to determine the horizontal positions of the eleven test points. Results show that a horizontal positional root mean squares error of 11 mm can be obtained using the Leica SR 530 RTK-GPS.