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Analysis of positioning methods using Global Navigation Satellite Systems (GNSS) in Polish State Railways (PKP)

Specht Mariusz, Szmagliński Jacek, Specht Cezary, Koc Władysław, Wilk Andrzej, Czaplewski Krzysztof, Karwowski Krzysztof, Dąbrowski Paweł S., Chrostowski Piotr, Grulkowski Sławomir

Zeszyty Naukowe Akademii Morskiej w Szczecinie

2020

nr 62 (134)

26--35

Each year, global navigation satellite systems (GNSS) improve their accuracy, availability, continuity, integrity, and reliability. Due to these continual improvements, the systems are increasingly used in various modes of transport, including rail transport, the subject of this publication. GNSS are used for rail passenger information, rail traffic management, and rail traffic control. These applications differ in the positioning requirements that satellite navigation systems must meet. This article presents the methods and systems of rolling stock location and tracking using the Polish State Railways (PKP) as an example. The information on the equipment used for train positioning is not specified anywhere, hence they may differ, even for the same multiple units travelling in different parts of the country. In addition, the publication presents the progress of the European Train Control System (ETCS) implementation by the PKP.

Installation of GNSS receivers on a mobile railway platform – methodology and measurement aspects

Dąbrowski Paweł S., Specht Cezary, Koc Władysław, Wilk Andrzej, Czaplewski Krzysztof, Karwowski Krzysztof, Specht Mariusz, Chrostowski Piotr, Szmagliński Jacek, Grulkowski Sławomir

Zeszyty Naukowe Akademii Morskiej w Szczecinie

2019

nr 60 (132)

18--26

Determining the course of a railway track axis using satellite methods relies on ensuring the precise assembly of GNSS receivers in dedicated measuring devices. Depending on the number of receivers, solutions that are based on placing the apparatus directly above the railway track axis (as well as in eccentric positions) are used to indirectly obtain data to form the basis of the desired results. This publication describes the installation of five GNSS receivers on a mobile measuring platform as part of the InnoSatTrack project. The methodology and the procedure of the geodetic measurements required to obtain the geometrical configuration of the measuring apparatus, specified in the technical project, are presented. The publication presents the principles of total station measurement methods as well as the steps taken to achieve precise results from staking out. The process of acquiring the same configuration of the GNSS receivers, based on the geometry of the squares on the two measuring platforms that were used in the research, has been shown. The final determination of the position of the receivers did not exceed an error of 0.010 m with an average error of 0.003 m, despite the occurrence of mounting difficulties. The results have demonstrated the high credibility and effectiveness of the presented solution.