Digital Filtering of Railway Track Coordinates in Mobile Multi-Receiver GNSS Measurements

Area of Science:

• Geomatics Engineering
• Geodetic Surveying
• Railway Engineering

Background:

• Accurate railway track coordinate measurement is crucial for infrastructure maintenance and safety.
• Mobile Global Navigation Satellite System (GNSS) measurements offer a flexible approach to track surveying.
• Digital filtering is essential for refining GNSS data to determine precise track axes.

Purpose of the Study:

• To propose and evaluate a novel technique for mobile GNSS measurements of railway track coordinates.
• To address the challenge of precise railway track axis determination using digital filtering.
• To assess the quality and preparation of GNSS measurement results for further processing.

Main Methods:

• Utilizing a measuring platform equipped with multiple GNSS receivers in Real-Time Kinematic (RTK) mode.
• Employing two GNSS receivers to establish the directional base vector of the measuring platform.
• Applying specialized digital filtering and geometrically constrained parameters for data processing.
• Performing post-processing corrections for enhanced measurement accuracy.

Main Results:

• The proposed technique enables precise determination of railway track axes.
• GNSS signal processing methods were validated for accuracy in track measurement.
• The study confirmed the applicability of the developed GNSS measurement and processing approach.

Conclusions:

• The mobile GNSS measurement technique with digital filtering is effective for precise railway track axis determination.
• The method provides a reliable approach for railway surveying and data acquisition.
• Further research can build upon this validated GNSS signal processing methodology.