| dc.description.abstract | Recently, Sri Lanka has developed a greater interest in surveying applications based
on Continuously Operating Reference Station (CORS) technology. CORS Real Time
Kinematic (RTK) can perform well through a good Global System for Mobile
Communications (GSM) coverage area by receiving the corrections in real-time. It is
very difficult when facing the GSM network coverage limitation issue in remote
areas. As an alternative solution, Post Processing Kinematic (PPK) is a good solution
to face this problem because it does not need a real-time data communication link
for the correction signal when conducting the survey. This study aims to compare
the RTK and PPK solutions in a CORS network in Sri Lanka. Seven known points
were selected near the Belihuloya area. The CORS reference station was the SULECO
SUSL station. Position solutions were compared for both PPK and RTK methods with
several sets of observations. According to the results, the horizontal variation of the
PPK was as accurate as the RTK solution, which was below the 1cm mean difference.
However, the vertical accuracy was lower than the horizontal accuracy in the PPK
technique. This was around 10 to 15cm variations in the study area. In conclusion,
both PPK and RTK techniques gave similar results in terms of horizontal accuracy
in a CORS network. Therefore, the issues of real-time corrections transfer in a CORS
network can be overcome by adopting PPK mode for the boundary and detail survey
without interrupting the progress. | en_US |
