SPECTRA PRECISION FOCUS 2 SERIES TOTAL STATION USER GUIDE
5 –
Applications
58
8. If the vertical circle is on Face-2, a message
Turn to F1
appears. If this happens, rotate the
telescope and alidade and sight the BS point in Face-1.
The station and raw data are stored in the current job and the
station setup is completed. The screen returns to the Basic
Measurement screen. The AZ item displays the result of
determining the backsight azimuth.
Multiple point resection
A resection sets up the station using angle/distance measurements to known points.
•
A maximum of 10 points can be used in a resection.
•
Measurements can be distance and angle, or angle only.
•
Calculation starts automatically when enough measurements are taken.
•
Poor observations can be deleted and recalculated if necessary.
•
The minimum data required for a resection is either three angle measurements, or two distance
measurements.
Note –
If the angle between known point 1 and known point 2 (measured from the station point) is
extremely acute or extremely oblique, the resulting solution will be less reliable geometrically. For
geometric reliability, select known point locations (or station point locations) that are widely spaced.
