In 2009, research began at the Gdańsk University of Technology on the use of the NAVGEO phase measurement service of the ASG-EUPOS active geodetic network for conducting continuous measurements of railway track alignment. The goal of the ongoing research is to attempt to assess the feasibility of using GNSS phase measurements, performed by several receivers, for the design and inventory of railway tracks. To assess the accuracy of determining the track axis, the values of cross-track error (XTE) from the reference direction were determined. The XTE variable was subjected to signal analysis methods (Chebyshev low-pass filtering and fast Fourier transform) in order to eliminate the influence of random measurement errors and to obtain coordinates representing the actual shape of the track.THE ACCURACY ASSESMENT OF DETERMINIG THE AXIS OF RAILWAY TRACK BASING ON THE SATELLITE SURVEYING
In 2009, at the Gdansk University of Technology there have been carried out, for the first time, continuous satellite surveying of railway track by the use of the relative phase method based on geodesic active network ASG-EUPOS and NAVGEO service. Still continuing research works focused on the GNSS multireceivers platform evaluation for projecting and stock-taking. In order to assess the accuracy of the railway track axis position, the values of deviations of transverse position XTE (Cross Track Error) were evaluated. In order to eliminate the influence of random measurement errors and to obtain the coordinates representing the actual shape of the track, the XTE variable was analyzed by signal analysis methods (Chebyshev low-pass filtering and fast Fourier transform). (…)
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Source: Logistyka Magazine