Scanning\Setup\Scale Factor - Leica ScanStation P30 Manual

7.2.8
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Description
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ScanStation P40/P30, Scanning

Scanning\Setup\Scale Factor

Select Scan Begin, Shift -> Scale or Traverse, Traverse Begin, Shift -> Scale or
Scan Parameters, Shift -> Scale.
In the Scale Factor menu atmospheric and geometric corrections can be defined.
The corrections are given as PPM (parts per million).
In the Atmospheric PPM page of the Scale Factor screen the dry air temperature
and air pressure can be entered to calculate the atmospheric PPM for the atmos-
pheric distance correction. The atmospheric correction is applied to every measured
slope distance and its scale factor S can be calculated by
S = 1 + (Atmospheric PPM * 10
In the Geometric PPM page of the Scale Factor screen the geometric PPM for the
geometric distance correction can be calculated from the instrument height above a
reference datum (Height PPM) and an individual correction (User entered PPM).
The geometric correction is applied only to the horizontal distance for targets and its
scale factor S can be calculated by
S = 1 + (Geometric PPM * 10
Once a scale factor is enabled the
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icon in the status bar is visible.
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