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9.7.2 Measuring Information
Measurement
sequences
The following measurement sequences are possible:
• Horizontal direction and vertical-angles only (resection)
• Distance and horizontal direction and vertical-angle
• Horizontal direction and vertical-angles to some point(s) and horizontal
direction and vertical angles plus distance to other point(s).
Single face I, single face II, or dual face I and II measurements are always
possible. No specific point sequence or specific face sequences are required.
Dual face meas-
urements
When measuring the same target in both faces, the reflector height may not
be changed when observing in the second face. Error checks are made for dual
face measurements to ensure the same point is sighted with the other face.
)
• If a target point is measured several times in the same face, only the last
valid measurement is used for computation.
• For the calculation of the station position, measured target points can be
re-measured, included in calculations, or excluded from calculations.
Measurements
not included in
computations
Target points with 0.000 height are discarded for height processing. If a target
point has a valid height of 0.000 m, use 0.001 m to include it for height
processing.
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