RT-Base S User Manual
Revision: 151112
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Figure 22. Averaging to a different position example
The problem of averaging to a different position happens each time that the RT-Base S
goes through its averaging process. There is nothing magical about the RT-Base S that
allows it to get its own position accurate to 2 cm or better. It is subject to the same
errors that all GNSS receivers have and can only average its position to about 1.8 m
CEP.
If the user is prepared to wait a long time (typically more than 24 hours) then GNSS is
able to improve the accuracy of the base station antenna so it is accurate to 2 cm or
better. However, since the timescale for this is long it is not usually practical, except for
permanent installations. (Even when you have a permanent installation it is not required
since all it does is allows you to relate your measurements to a surveyor’s
measurements and this is rarely required).
To overcome the problem of averaging the save/restore feature of the RT-Base S
should be used. When using the Save/Restore feature the RT-Base S will save the
position where it last averaged and then use this next time (instead of averaging again).
This way the error is the same each time and the repeatability is perfect. You must
remember to put the antenna in the same location each time, accurate to 1 cm or better,
when using the Save/Restore feature.