User's Manual

4 Applications
64 Spectra Precision Focus 4 Total Station User Guide
Sighting the backsight by entering the azimuth angle
1. To enter the azimuth angle to the backsight
point, press
[2] or select Angle from the
Backsight screen.
2. If there is no point name for the BS, press
[ENT] on
the BS field.
3. In the HA field, enter the azimuth angle to the BS point.
If you press
[ENT] without entering a value in the HA field, the azimuth is
automatically set to 0°00'00".
4. Sight the BS point and press
[ENT].
Resection
A resection sets up the station using angle/distance measurements to known points.
Backsight point
Azimuth
Station point
(Xi, Yi, Zi)
Instrument height
X
Y0
Y
Z
X0
X2
X1
X
Height 1
Height 2
Instrument height
Station point (Xi, Yi, Zi)
Y1 Y0 Y2
Y
Known point 1
(X1, Y1, Z1)
Known point 2
(X2, Y2, Z2)