Abstract: A method for measuring heliostats including: a) providing a light source, b) aligning at least some heliostats to be measured in order to reflect light from the light source onto a predefined target point or target area in the sky or in the vicinity of the solar tower; c) moving a flying apparatus having at least one camera along a predefined flight pattern around and over the target point or target area, and simultaneously capturing images of one of the one or more heliostats to be measured by the camera at a predefined time interval; d) evaluating the images wherein a virtual target is calculated from the images by a previously determined or stored capturing position of the corresponding image; e) determining, by the focal point on the virtual target, a target vector of each of the heliostats to be measured and comparing it with a target value.

Abstract: A method for measuring heliostats including: a) providing a light source, b) aligning at least some heliostats to be measured in order to reflect light from the light source onto a predefined target point or target area in the sky or in the vicinity of the solar tower; c) moving a flying apparatus having at least one camera along a predefined flight pattern around and over the target point or target area, and simultaneously capturing images of one of the one or more heliostats to be measured by the camera at a predefined time interval; d) evaluating the images wherein a virtual target is calculated from the images by a previously determined or stored capturing position of the corresponding image; e) determining, by the focal point on the virtual target, a target vector of each of the heliostats to be measured and comparing it with a target value.