Offset Mode; Offset (Angle) - Titan TTS2 Manual

8. Offset mode

It includes
"Offset(Dist1)","Offset(Dist2)","Offset(Plane)","Offset(Column)".
These functions help for coordinate measurement, and can get the
coordinates of the point which the prism can't be at. Before operating
these functions, please set 'STA', orientation, instrument height and
target height.

8.1 Offset (Angle)

This mode is specifically useful when setting up prism difficultly,
e.g. in the center of a tree. Set up the prism at the point 'P' which is
the same horizontal distance away from the instrument .The diagram
for angle offset is as followed.
When measuring the coordinate of the earth point'A1'
is the projection of 'AO', set up the height of instrument and the
height of target.
When measuring the coordinate of 'AO', set up the height of
instrument only (and the height of target should be set to 0).
In the menu of "Offset", select "1. Offset (Angle)" to enter the
interface of "Offset (angle)-Prism":
If you want to re-input the target height, press [T.H] to re-input.
five functions which are
45
"Offset(Angle)",
which