Spectra Precision Survey Pro v5.4 - Manual (Page 49)

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As previously explained for BS Azimuth, you can in the same way check
the setup either By Angle or By Point (see Check the Setup above).
You can also use the By Distance option. Just make sure the instrument
is still aimed in the direction of the backsight point and tap Check. The
measured horizontal and vertical distance errors are reported on the
screen. They should be as close a possible to zero.
• If you are satisfied with the read values, tap Finish. You can now start
measuring new points.
3. If you choose New Point:
– Place a target at the unknown (new) backsight point.
– Aim the instrument at this point.
– Enter the known or an assumed value of azimuth along this direction.
– Specify the type of target used at the backsight point ( Fixed Target or
Roving Target).
– Using , select the name of this target. As a result, the HR field is
updated to provide the height of this target. Update the height value if
necessary.
– Tap Measure & Set to measure the new point and set the backsight.
NOTE: If the equipment used is unable to set the backsight circle, the button is
labeled “ Measure & Read” instead of “Measure & Set”.
– Enter a name and description for the new backsight point.
– Tap to store the point.
– Review the summary of the station setup, as shown on the screen. If it’s
not as expected, tap
Back and resume the setup.
– If the setup is fine, tap Finish. You can now start measuring new points.
Station Setup on Unknown Point, Resection Method
The resection method is illustrated below.
PT1
PT3
PT2
PT4