10 Glossary
TSOX_002
SA
SA
SA
SA
Hz0
Hz
KA
KA
KA
VK
HK
ZA
ZA
V
ZA = Line of sight / collimation
axis
Telescope axis = line from the
cross hairs to the center of the
objective.
SA = Standing axis
Vertical rotation axis of the
telescope.
KA = Tilting axis
Horizontal rotation axis of the
telescope. Also known as the
Trunion axis.
V = Vertical angle / zenith
angle
VK = Vertical circle
With coded circular division for
reading the vertical angle.
Hz = Horizontal direction
HK = Horizontal circle
With coded circular division for
reading the horizontal angle.
Direction of gravity. The compensator defines the plumb
line within the instrument.
Angle between plumb line and standing axis.
Standing axis tilt is not an instrument error and is not
eliminated by measuring in both faces. Any possible
influence it may have on the horizontal direction or verti-
cal angle is eliminated by the dual axis compensator.
Instrument axis
Plumb line / compensator
Standing axis inclination
Glossary 67
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