Spectra Precision Survey Pro v5.1 - Manual (Page 44)

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• While the rover receives data (corrections and position) from the base, enter
the antenna height you measured previously (
Measured field) and how you
measured it ( To field).
You may ask the rover to log raw data (for post-processing) by just
specifying a recording interval in the
Post Processing Recording Interval field.
If you earlier set up a base doing the same, then make sure you are using
the same recording interval for both receivers. Select “Off” if data logging
is not required.
• Tap Next.
• Confirm or change the point where the base is located. (Survey Pro will
automatically skip that step if you have previously set up your own base.)
For most receivers, the height of the base antenna is broadcast over the
data link, so you do not need to change the base antenna height displayed
on this page.
NOTE: The broadcast height will be reduced to the antenna phase center, and will
show as an “Unknown” antenna brand.
If your rover receiver does not get the base antenna height from the data
link (
Measured= ”0.000”, Base Brand= “Unknown” and Antenna Type=
“Unknown Broadcast”), you need to specify the antenna brand and type
used at the base, enter the measured height and specify the mark used to
measure the height.
• If the Finish button is displayed, this means the coordinate system is fully
solved, and you are ready to collect data.
If the
Next button is displayed instead, this means you are working in
Default Ground mode, where a calibration is always required, or you are
working in mapping plane mode but you started your base on a new point
with a new autonomous position. Tap this button. You will see a new screen
asking for occupation of control points (see screen example).
For the sake of clarity, calibration is discussed in a separate section (see
Solving Calibration on page 44).
NOTE: Solving the calibration is optional when your coordinate system is a known
map projection and datum, and your base was setup on a known point.
At this stage, you may tap Start Now to begin surveying with a temporary
calibration solution, which will solve your translation, but the scale and
orientation parameters will remain unknown. You can collect data points;
their local coordinates will be calculated with this temporary calibration.
At any time during the survey, you can collect the required number of GNSS
control points and solve the proper calibration for your site. After you solve
the calibration, any data collected points will automatically be recalculated
using the latest solution of coordinate system.