Abstract
Correction of determined coordinates of railway tracks in mobile satellite measurements
Highlights
The speeds of trains travelling on operated railway lines and their safety are closely related to the designed and existing shape of the track axis – the centerline.Considering the fact that, during line exploitation, its shape deforms horizontally and vertically, its continuous monitoring and diagnostics is a crucial element of its management system
The authors of presented article discuss the algorithms adopted to the mobile satellite measurement method (MSM) [14]. This means that the measurement is carried out at higher speeds in relation to the cited surveying method, and the measured positions need to be recalculated in order to obtain the position of the track axis
The main idea of the technique of mobile satellite measurements (MSM) [8, 10, 11, 14], developed since 2009 by the Gdańsk University of Technology and the Naval Academy / Maritime University of Gdynia, is measuring railways with the use of global navigation satellite system (GNSS) antennas installed over the bogie pivots of a measuring wagon
Summary
The speeds of trains travelling on operated railway lines and their safety are closely related to the designed and existing shape of the track axis – the centerline. Regardless of the measurement method, the accuracy of the control points’ determination and the issue of its maintenance remains an important problem This situation occurs in the method of determining the track axis using mobile total stations (introduced in recent years and already widely used), allowing quasi–continuous registration of spatial positions. The authors of presented article discuss the algorithms adopted to the mobile satellite measurement method (MSM) [14] This means that the measurement is carried out at higher speeds in relation to the cited surveying method, and the measured (in RTK mode) positions need to be recalculated in order to obtain the position of the track axis. To determine corrections for the measured horizontal coordinate signal, the authors developed an algorithm based on track inclination measurements
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