CALIBRATION OF A TOTAL STATION

The present inventive concept relates to a system (1) comprising: a total station (10) comprising a center unit (100) mounted on an alidade (110) for rotation about a first axis (A1), wherein the alidade (110) is mounted on a base (120) of the total station (10) for rotation about a second axis (A2) orthogonal to the first axis (A1), whereby a sighting axis (A3) of the total station (10) is rotatable about a rotation point; and an optical calibration element (12) connectable to the total station (10) or a support (130) on which the total station (10) is installed; and wherein the optical calibration element (12) in a connected state is arranged such that, when the sighting axis (A3) is rotated about the rotation point to form a non-zero calibration angle (B) relative to a plane having a normal parallel to the second axis (A2), the center unit (100) is aimed toward a target (14) via the optical calibration element (12).