Real-Time Kinematic (RTK) positioning is one of the most widely used GNSS techniques for high-precision surveying and cadastral applications, providing centimeter-level accuracy in real time. Its performance, however, can be affected by urban environments, where signal obstruction, multipath effects, dense vegetation, and electromagnetic interference degrade positioning quality. This study evaluates RTK accuracy and reliability in urban conditions through a comparative analysis of two GNSS receivers from different technological generations: Trimble R10 and Hi-Target V200. Field experiments were conducted in Timisoara, Romania, during two independent observation sessions in March and April 2025. Four control points with varying environmental conditions, from open areas to locations affected by buildings and vegetation, were measured simultaneously using both receivers. RTK corrections were obtained via the Romanian permanent GNSS network, ROMPOS, using the NTRIP protocol. The analysis focused on X, Y, and Z coordinates, absolute coordinate differences, dispersion patterns, and satellite-related quality indicators, including satellite availability and PDOP values. The results show that both receivers achieved positioning accuracy better than 3.5 cm under all tested conditions. Trimble R10 demonstrated stability of the FIX solution, particularly in the vertical component, while Hi-Target V200 benefited from multi-constellation tracking. The findings highlight the importance of receiver hardware and processing strategies.

GNSS, RTK positioning, urban environment, positioning accuracy, multi-constellation GNSS, PDOP

geodesy engineering

Presentation: poster