Plataforma de posicionamento, de elevada precisão e de baixo custo, baseada em GPS diferencial.

Abstract

Positioning systems are increasingly used in military and civil applications. There are several limitations and source of errors that compromise the precision and accuracy of positions. In this work these issues are addressed in a theoretical discussion about global navigation systems, specially, the NAVSTAR GPS. Based on that scenario, a differential GPS solution is proposed and it consists of an open source library called RTKLIB jointly with a u-blox EVK-6T receiver. To evaluate that platform on real conditions, a series of experiments and observations were performed, in distinct environments, at Leuven – Belgium in a partnership with Essensium company that provided the necessary infrastructure. By the end of the tests, factors as precision of measurements, ambiguity resolution, response and converge time, baseline distance, as well, were analysed. Depending on the conditions, precision in the level of centimeters were achieved, when simple GPS solutions result in deviation of meters.