|Abstract: ||Various technologies described herein pertain to evaluating a beam
reflected by a heliostat. A portable target that has an array of sensors
mounted thereupon is configured to capture the beam reflected by the
heliostat. The sensors in the array output measured values indicative of
a characteristic of the beam reflected by the heliostat. Moreover, a
computing device can generate and output data corresponding to the beam
reflected by the heliostat based on the measured values indicative of the
characteristic of the beam received from the sensors in the array.