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Although the technique of GPS static survey has been widely
used in control survey, long observation time and the following
post-processing work are still needed. The combination of OTF
(On-the-Fly) phase ambiguity resolution method and GPS RTK (Real
Time Kinematic) surveying design enables the solution of phase
ambiguities in a moving situation. Such a RTK system needs only
few observation data to perform positioning, so it is able to
shorten the time needed for GPS survey. With the increasing
number of GPS satellites and the OTF phase ambiguity resolution
method , it has lead to the practical stage of RTK. This study
discusses the application of RTK system on control survey and
cadastral survey , with emphasis on the accuracy issue ,
performance efficiency , as well as how to increase reliability.
The precision of RTK has been proved to approach 15 mm+3 ppm
that meets the requirements of 3rd and 4th order control survey.
In the application of cadastral survey , centimeter level
accuracy for cadastral coordinates can be reached through proper
datum transformation. From the viewpoint of practical
application, this study considers the distance limit for RTK
technique, and examines the scheme to increase reliability , in
order to confirm the survey accuracy.
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