Pole bias adjustment

Pole bias adjustment may be required to correct small errors introduced when the reference point of the tilt sensor being used is not aligned with the point of measurement. The point of measurement is the pole tip (when the IMU is aligned) or the antenna phase center (GNSS‑only mode).

When using IMU tilt compensation, Trimble recommends using an undamaged carbon fiber range pole in excellent condition. The quick release should also be in optimal condition with no damage to the mating surface between the receiver and the quick release.

The pole bias adjustment corrects errors introduced when using a pole that may have become damaged during normal use and is no longer perfectly straight, or if the pole tip is no longer true and perfectly aligned with the center of the pole. Pole bias adjustment should be performed in optimal RTK environment with a good IMU alignment.