Spectra Precision Survey Pro v3.80 Ranger GPS User Manual - Manual (Page 40)

GPS User’s Manual
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c. Note: If you have post processing data collection turned on, the
receiver will now open a file (with the next available default
name), start recording GPS raw data, and enter the antenna
information for this setup.
d. Once the base station location is received over the radio link, you
are prompted to set the base reference position is Survey Pro. If
the base coordinate already exists in your job file, then that point
is chosen by Survey Pro as the base point. If the coordinate is new
to the job file, then you are prompted to give this new point a
name and Survey Pro will create the new base point.
e. The Base Setup wizard opens with the chosen Base Point name
displayed.
f. If your receiver does not support antenna height configuration,
Survey Pro will attempt to calculate the height. You must verify
that the values are correct.
g. Tap
1H[W! and the base position received from the radio link is
displayed. Tap 6(7 to configure the base station reference
position in Survey Pro.
h. When done, you will return to the Survey menu.
Solve Localization
When you start a GPS survey from an autonomous base position, you
need to solve a Localization to adjust GPS measurements into local
coordinates. This is the case for both horizontal projection modes.
Using
Ground - TDS Localization , you need to solve a localization to
relate your arbitrary GPS start point into your non-geodetic local
system. Using a
Mapping Plane , you need to solve a localization to
shift the autonomous GPS start point into accurate geodetic
coordinates.
In either horizontal mode, the procedure is the same. Starting from
an autonomous GPS base setup, you measure GPS positions on
control points with know local plane (N,E) coordinates. The
parameters for a 2D similarity transformation are calculated with a