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© Leica
TPS-System 1000-2.3.1en
143
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IX
Automatic Target Recognition
TCA instruments are motorized and equipped with
Automatic Target Recognition (ATR1) coaxially in the
telescope. The EGL1 guide light, mounted on the
telescope, is optional.
These instruments permit automatic angle and distance
measurements to normal prisms and reduce the tedium
of precise visual sighting to prisms.
The prism is sighted with the optical sight only.
Initiating a distance measurement will turn the
instrument with the help of the motors to sight the
prism-centre automatically.
The angles V and Hz are measured to the centre of the
prism at the completion of the distance measurement.
As with all other instrument errors, the collimation
error of the automatic target recognition (ATR1) must
be redetermined periodically (Refer to chapter
"Checking and Adjusting").