Investigation of accurate method in 3-D position using Cors-Net in Istanbul

Abstract

In this study, for Istanbul, there are two Cors Networks (Cors-TR, Iski Cors) providing Virtual Reference Station (VRS), and Flachen Korrektur Parameter (FKP), corrections to rover receiver for determining 3-D positions in real time by Global Positioning System (GPS). To determine which method (or technique) provides accurate method for position fixing, a test network consisting of 49 stations was set up in Yildiz Technical University Davudpasa Campus. The coordinates of the stations in the test network were determined by conventional geodetic, classical RTK, VRS and FKP methods serviced by both Cors-TR and Iski Cors. The results were compared to the coordinates by the conventional method by using total station. The results showed a complex structure as the accuracy differs from one component to another such as in horizontal coordinates, Y components by CorsTR_VRS and Cors_TR_ FKP showed 'best' results while the same technique provided X components consistent accuracy with the Y component but less accurate than by real time kinematic (RTK). In vertical components, of all the techniques used for the h components, CorsTR_VRS showed 'best' accuracy with three outliers.

Performance of network RTK correction techniques (FKP, MAC and VRS) under limited sky view condition

“…When the stations were planned, the most optimal data were taken into consideration to observe the movements of the plate (Mekik et al, 2011;Uzel et al, 2011). These control centers send correction data to the user using FKP, MAC and VRS techniques (Gumus et al, 2012). (Yıldırım et al, 2013) 1.2 Network RTK correction Techniques…”

“…The global positioning system (GPS) provides precision at cm level when the position is determined by a relative method (Seeber, 2003). However, requiring at least two receivers, precise trajectory information, and software knowledge, the relative method is not efficient in performing positioning in terms of the time and effort (Gumus et al, 2012;Tusat and Ozyuksel, 2018). Today, developments in GPS/GNSS technology have enabled real-time determination of point locations.…”

“…A few studies have investigated which correction method works better for the CORS-TR system. (Gumus et al, 2012), Forty-nine different coordinates obtained from RTK, CORS-TR and IskiCors were corrected using FKP and MAC and the results were compared with the classical local method of total station measurements. The authors reported that the performance of the correction methods for the CORS-TR system was superior.…”