| 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 that
problem because it does not need a real-time
data communication link for the correction
signal when doing 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 accurate as
the same 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 |
