v5.20 - Classic DocuShare Home - Trimble

8 RTK Mapping
Base Station
Baseline
Figure 8.1 Relative measurement between base station and rover
When the data from these two receivers is combined, the result is a
three-dimensional vector between the base station and the rover, called
a baseline, which enables a position to be computed. RTK data
collection uses a radio to transmit the base data to the rover for the
duration of the data collection session. As each GPS position is
computed, a correction can be applied to significantly improve the
level of accuracy of the feature being observed.
Note – Postprocessed techniques (which require data to be stored and
corrected some time after the data collection process has been
completed) are not discussed here. RTK systems are designed to
operate for RTK data collection only.
RTK data collection requires the simultaneous observation of the same
five (or more) satellites by both the base station and rover. You can
have as many rovers as you like simultaneously collecting data;
however, all rovers must be able to see the same satellites as the base
station.
188 TSC1 Asset Surveyor Operation Manual
Rover