Range
Tilt range
Tilt Compensation works in arbitrary alignments of the pole as long as the target has free line-of-sight to the total station and positions can be measured continuously.
Range from total station
The maximum measuring range between the tilted pole and the total station depends on the achievable target lock and the remote connection range, typically 300 m.
➜ A total station with target locking and continuous distance measurement is required.
➜ A RH18 or CCD18 is required on the total station to support AP20 Tilt Compensation.
Accuracy
Since the Tilt Compensation uses continuous total station observations for the determination of the pole tilt, the tilt accuracy depends on various factors.
• Angular accuracy of the total station
• Distance accuracy of the total station
• Target type
• EDM measurement frequency of the total station
• Environmental and atmospheric conditions
• Target height
• Level of pole tilt
The derived additional pole tip accuracy in 2D and 1D, given as root mean square, depends on the level of tilt and the used target height. The lower the target height, the higher the pole tip accuracy.
Measurement principle
Combining the reflector position with attitude information from an Inertial
Measurement Unit (IMU) results in a tilt compensated pole tip position.