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Before Leaving the Office 4
The settings listed in Table 4.1 are critical for the following reasons:
Ifa Logging interval is set incorrectly, the Asset Surveyor
software does not log data as often as you require, and may
possibly not log certain data at all.
Ifthe Minimum positions setting is incorrect, you may not log
sufficient GPS positions for point features to achieve your
desired level of accuracy.
Ifthe Position mode setting is incorrect, the Asset Surveyor
software may log 2D positions (which are generally much less
accurate than 3D positions) when 3D positions are required. If it
is necessary to log only overdetermined positions (5 or more
satellites) to achieve a desired level of accuracy, then use
Overdetermined 3D mode.
Ifthe Elevation mask is set too low, your GPS rover may use
satellites which are not visible to, or usable by, the base station.
This may make it impossible to differentially correct the data
you have logged.
Ifthe SNR mask is set too low, your GPS rover may log
positions that are inaccurate due to low signal quality.
Ifthe PDOP mask is set too high, your GPS rover may log
inaccurate positions due to poor satellite geometry.
For more information about each critical setting, refer to the TSC1
Asset Surveyor Software User Guide.
– When using a Pro XL, ProXR, ProXRS, 4600LS, Site
Surveyor 4400, GPS Total Station ® 4700, GPS Total Station 4800, or
Series 4000 receiver, you can obtain submeter accuracy with a single
position, and can therefore reduce the Minimum positions setting to 1 if
you want to minimize the amount of time spent recording each point
feature.
TSC1 Asset Surveyor Operation Manual 55