Characteristic Analysis of GNSS Real-Time Kinematic for Long Baselines
The Real-time Kinematic (RTK) GNSS positioning has predominantly been applied to short baseline applications
due to the decorrelation of the measurements between the reference station and the rover. The performance of the solutions
was investigated for two types of RTKs, that is, 1) a single-baseline RTK and 2) the network-based RTK. The characteristics
of RTK were analyzed in this study, especially with the baseline lengths between two receivers. The accuracy and stability
of the RTK are highly dependent on the success rates of the ambiguity resolution, which is significantly stable up to 50km of
the baselines. In addition, the ratio of fixed ambiguities for the NRTK is almost 150% higher compared to the case of SRTK.
Finally, the horizontal errors are closely related with the Virtual Reference Station (VRS) locations generated by the server.
Indexterms - Real-time kinematic, Network-based RTK, Surveying positioning.